diff --git a/Presentations/05-descriptive-analysis.Rmd b/Presentations/05-descriptive-analysis.Rmd
index 9043abf..b39f829 100644
--- a/Presentations/05-descriptive-analysis.Rmd
+++ b/Presentations/05-descriptive-analysis.Rmd
@@ -1,5 +1,5 @@
 ---
-title: "Exploratory Analysis"
+title: "Descriptive Analysis"
 subtitle: "[R for Advanced Stata Users](https://github.com/worldbank)"
 author: "Luiza Andrade, Rob Marty, Rony Rodriguez-Ramirez, Luis Eduardo San Martin, Leonardo Viotti"
 date: "DIME |The World Bank <br> `r format(Sys.time(), '%d %B %Y')`"
diff --git a/Presentations/05-descriptive-analysis.html b/Presentations/05-descriptive-analysis.html
index 5a30d5c..ec618b2 100644
--- a/Presentations/05-descriptive-analysis.html
+++ b/Presentations/05-descriptive-analysis.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html lang="" xml:lang="">
   <head>
-    <title>Exploratory Analysis</title>
+    <title>Descriptive Analysis</title>
     <meta charset="utf-8" />
     <meta name="author" content="Luiza Andrade, Rob Marty, Rony Rodriguez-Ramirez, Luis Eduardo San Martin, Leonardo Viotti" />
     <script src="libs/header-attrs/header-attrs.js"></script>
@@ -20,16 +20,15 @@
     <link rel="stylesheet" href="libs/remark-css/default.css" type="text/css" />
     <link rel="stylesheet" href="libs/remark-css/metropolis.css" type="text/css" />
     <link rel="stylesheet" href="libs/remark-css/metropolis-fonts.css" type="text/css" />
-    <link rel="stylesheet" href="custom-css.css" type="text/css" />
   </head>
   <body>
     <textarea id="source">
 class: center, middle, inverse, title-slide
 
-# Exploratory Analysis
+# Descriptive Analysis
 ## <a href="https://github.com/worldbank">R for Advanced Stata Users</a>
 ### Luiza Andrade, Rob Marty, Rony Rodriguez-Ramirez, Luis Eduardo San Martin, Leonardo Viotti
-### DIME |The World Bank <br> 16 November 2021
+### DIME |The World Bank <br> 13 January 2022
 
 ---
 
@@ -72,15 +71,15 @@
 ## .red[Not reproducible]
 
 Anything that requires
-<svg aria-hidden="true" role="img" viewBox="0 0 448 512" style="height:1em;width:0.88em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:#ac142a;overflow:visible;position:relative;"><path d="M128 184c0-30.879 25.122-56 56-56h136V56c0-13.255-10.745-24-24-24h-80.61C204.306 12.89 183.637 0 160 0s-44.306 12.89-55.39 32H24C10.745 32 0 42.745 0 56v336c0 13.255 10.745 24 24 24h104V184zm32-144c13.255 0 24 10.745 24 24s-10.745 24-24 24-24-10.745-24-24 10.745-24 24-24zm184 248h104v200c0 13.255-10.745 24-24 24H184c-13.255 0-24-10.745-24-24V184c0-13.255 10.745-24 24-24h136v104c0 13.2 10.8 24 24 24zm104-38.059V256h-96v-96h6.059a24 24 0 0 1 16.97 7.029l65.941 65.941a24.002 24.002 0 0 1 7.03 16.971z"/></svg> Copy-pasting
-<svg aria-hidden="true" role="img" viewBox="0 0 512 512" style="height:1em;width:1em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:#ac142a;overflow:visible;position:relative;"><path d="M167.02 309.34c-40.12 2.58-76.53 17.86-97.19 72.3-2.35 6.21-8 9.98-14.59 9.98-11.11 0-45.46-27.67-55.25-34.35C0 439.62 37.93 512 128 512c75.86 0 128-43.77 128-120.19 0-3.11-.65-6.08-.97-9.13l-88.01-73.34zM457.89 0c-15.16 0-29.37 6.71-40.21 16.45C213.27 199.05 192 203.34 192 257.09c0 13.7 3.25 26.76 8.73 38.7l63.82 53.18c7.21 1.8 14.64 3.03 22.39 3.03 62.11 0 98.11-45.47 211.16-256.46 7.38-14.35 13.9-29.85 13.9-45.99C512 20.64 486 0 457.89 0z"/></svg> Manual formatting after exported
+&lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="rfa" style="height:0.75em;fill:#ac142a;position:relative;"&gt;&lt;path d="M128 184c0-30.879 25.122-56 56-56h136V56c0-13.255-10.745-24-24-24h-80.61C204.306 12.89 183.637 0 160 0s-44.306 12.89-55.39 32H24C10.745 32 0 42.745 0 56v336c0 13.255 10.745 24 24 24h104V184zm32-144c13.255 0 24 10.745 24 24s-10.745 24-24 24-24-10.745-24-24 10.745-24 24-24zm184 248h104v200c0 13.255-10.745 24-24 24H184c-13.255 0-24-10.745-24-24V184c0-13.255 10.745-24 24-24h136v104c0 13.2 10.8 24 24 24zm104-38.059V256h-96v-96h6.059a24 24 0 0 1 16.97 7.029l65.941 65.941a24.002 24.002 0 0 1 7.03 16.971z"/&gt;&lt;/svg&gt; Copy-pasting
+&lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="rfa" style="height:0.75em;fill:#ac142a;position:relative;"&gt;&lt;path d="M167.02 309.34c-40.12 2.58-76.53 17.86-97.19 72.3-2.35 6.21-8 9.98-14.59 9.98-11.11 0-45.46-27.67-55.25-34.35C0 439.62 37.93 512 128 512c75.86 0 128-43.77 128-120.19 0-3.11-.65-6.08-.97-9.13l-88.01-73.34zM457.89 0c-15.16 0-29.37 6.71-40.21 16.45C213.27 199.05 192 203.34 192 257.09c0 13.7 3.25 26.76 8.73 38.7l63.82 53.18c7.21 1.8 14.64 3.03 22.39 3.03 62.11 0 98.11-45.47 211.16-256.46 7.38-14.35 13.9-29.85 13.9-45.99C512 20.64 486 0 457.89 0z"/&gt;&lt;/svg&gt; Manual formatting after exported
 
 --
 
 ## .green[Reproducible]
 
-<svg aria-hidden="true" role="img" viewBox="0 0 581 512" style="height:1em;width:1.13em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:#046307;overflow:visible;position:relative;"><path d="M581 226.6C581 119.1 450.9 32 290.5 32S0 119.1 0 226.6C0 322.4 103.3 402 239.4 418.1V480h99.1v-61.5c24.3-2.7 47.6-7.4 69.4-13.9L448 480h112l-67.4-113.7c54.5-35.4 88.4-84.9 88.4-139.7zm-466.8 14.5c0-73.5 98.9-133 220.8-133s211.9 40.7 211.9 133c0 50.1-26.5 85-70.3 106.4-2.4-1.6-4.7-2.9-6.4-3.7-10.2-5.2-27.8-10.5-27.8-10.5s86.6-6.4 86.6-92.7-90.6-87.9-90.6-87.9h-199V361c-74.1-21.5-125.2-67.1-125.2-119.9zm225.1 38.3v-55.6c57.8 0 87.8-6.8 87.8 27.3 0 36.5-38.2 28.3-87.8 28.3zm-.9 72.5H365c10.8 0 18.9 11.7 24 19.2-16.1 1.9-33 2.8-50.6 2.9v-22.1z"/></svg> R Markdown: dynamic document containing code and text that is exported directly from R into PDF, HTML, Word, Power Point and other formats 
-<svg aria-hidden="true" role="img" viewBox="0 0 384 512" style="height:1em;width:0.75em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:#046307;overflow:visible;position:relative;"><path d="M224 136V0H24C10.7 0 0 10.7 0 24v464c0 13.3 10.7 24 24 24h336c13.3 0 24-10.7 24-24V160H248c-13.2 0-24-10.8-24-24zm64 236c0 6.6-5.4 12-12 12H108c-6.6 0-12-5.4-12-12v-8c0-6.6 5.4-12 12-12h168c6.6 0 12 5.4 12 12v8zm0-64c0 6.6-5.4 12-12 12H108c-6.6 0-12-5.4-12-12v-8c0-6.6 5.4-12 12-12h168c6.6 0 12 5.4 12 12v8zm0-72v8c0 6.6-5.4 12-12 12H108c-6.6 0-12-5.4-12-12v-8c0-6.6 5.4-12 12-12h168c6.6 0 12 5.4 12 12zm96-114.1v6.1H256V0h6.1c6.4 0 12.5 2.5 17 7l97.9 98c4.5 4.5 7 10.6 7 16.9z"/></svg> LaTeX: typesetting system used for scientific publications that automatically reloads tables and figures every time the document is rendered 
+&lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 581 512" class="rfa" style="height:0.75em;fill:#046307;position:relative;"&gt;&lt;path d="M581 226.6C581 119.1 450.9 32 290.5 32S0 119.1 0 226.6C0 322.4 103.3 402 239.4 418.1V480h99.1v-61.5c24.3-2.7 47.6-7.4 69.4-13.9L448 480h112l-67.4-113.7c54.5-35.4 88.4-84.9 88.4-139.7zm-466.8 14.5c0-73.5 98.9-133 220.8-133s211.9 40.7 211.9 133c0 50.1-26.5 85-70.3 106.4-2.4-1.6-4.7-2.9-6.4-3.7-10.2-5.2-27.8-10.5-27.8-10.5s86.6-6.4 86.6-92.7-90.6-87.9-90.6-87.9h-199V361c-74.1-21.5-125.2-67.1-125.2-119.9zm225.1 38.3v-55.6c57.8 0 87.8-6.8 87.8 27.3 0 36.5-38.2 28.3-87.8 28.3zm-.9 72.5H365c10.8 0 18.9 11.7 24 19.2-16.1 1.9-33 2.8-50.6 2.9v-22.1z"/&gt;&lt;/svg&gt; R Markdown: dynamic document containing code and text that is exported directly from R into PDF, HTML, Word, Power Point and other formats 
+&lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 384 512" class="rfa" style="height:0.75em;fill:#046307;position:relative;"&gt;&lt;path d="M224 136V0H24C10.7 0 0 10.7 0 24v464c0 13.3 10.7 24 24 24h336c13.3 0 24-10.7 24-24V160H248c-13.2 0-24-10.8-24-24zm64 236c0 6.6-5.4 12-12 12H108c-6.6 0-12-5.4-12-12v-8c0-6.6 5.4-12 12-12h168c6.6 0 12 5.4 12 12v8zm0-64c0 6.6-5.4 12-12 12H108c-6.6 0-12-5.4-12-12v-8c0-6.6 5.4-12 12-12h168c6.6 0 12 5.4 12 12v8zm0-72v8c0 6.6-5.4 12-12 12H108c-6.6 0-12-5.4-12-12v-8c0-6.6 5.4-12 12-12h168c6.6 0 12 5.4 12 12zm96-114.1v6.1H256V0h6.1c6.4 0 12.5 2.5 17 7l97.9 98c4.5 4.5 7 10.6 7 16.9z"/&gt;&lt;/svg&gt; LaTeX: typesetting system used for scientific publications that automatically reloads tables and figures every time the document is rendered 
 
 ???
 
@@ -199,7 +198,7 @@
 
 .exercise[
 
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Use the `summary()` function to describe the `census` data frame.
 ]
 
@@ -260,7 +259,7 @@
 
 .exercise[
 
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Use the `summary()` function to display summary statistics for a continuous variable in the  `census` data frame.
 ]
 
@@ -276,7 +275,7 @@
 --
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Use the `table()` function to display frequency tables for:
 
 1. The variable `region` in the `census` data frame
@@ -852,7 +851,7 @@
 # Aggregating observations
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Recreate the `region_stats` data set,  now including the average and the standard deviation of the population.
 ]
 
@@ -884,7 +883,7 @@
 # Aggregating observations
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Use `huxtable` to format and export the object `region_stats`.
 ]
 
@@ -948,7 +947,7 @@
 # Running regressions
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Using the `census` data, run a regression of the number of divorces on population, urban population and number of marriages.
 ]
 
@@ -965,7 +964,7 @@
 # Running regressions
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Using the `census` data, run a regression of the number of divorces on population, urban population and number of marriages.
 ]
 
@@ -1053,7 +1052,7 @@
 # Running regressions
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Using the `census` data, run a regression of the number of divorces on population, urban population and number of marriages controlling for region fixed effects.
 ]
 
@@ -1071,7 +1070,7 @@
 
 
 .exercise[
-### Exercise <svg aria-hidden="true" role="img" viewBox="0 0 576 512" style="height:1em;width:1.12em;vertical-align:-0.125em;margin-left:auto;margin-right:auto;font-size:inherit;fill:currentColor;overflow:visible;position:relative;"><path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/></svg>
+### Exercise &lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="rfa" style="height:0.75em;fill:currentColor;position:relative;"&gt;&lt;path d="M528 448H48c-26.51 0-48-21.49-48-48V112c0-26.51 21.49-48 48-48h480c26.51 0 48 21.49 48 48v288c0 26.51-21.49 48-48 48zM128 180v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm-336 96v-40c0-6.627-5.373-12-12-12H76c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12zm288 0v-40c0-6.627-5.373-12-12-12H172c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h232c6.627 0 12-5.373 12-12zm96 0v-40c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v40c0 6.627 5.373 12 12 12h40c6.627 0 12-5.373 12-12z"/&gt;&lt;/svg&gt;
 Using the `census` data, run a regression of divorce on population, urban population and number of marriages controlling for region fixed effects.
 ]
 
diff --git a/Presentations/05-descriptive-analysis.pdf b/Presentations/05-descriptive-analysis.pdf
index 80f7f5d..6128815 100644
Binary files a/Presentations/05-descriptive-analysis.pdf and b/Presentations/05-descriptive-analysis.pdf differ
diff --git a/Presentations/libs/panelset/panelset.css b/Presentations/libs/panelset/panelset.css
index 6665f55..7436b60 100644
--- a/Presentations/libs/panelset/panelset.css
+++ b/Presentations/libs/panelset/panelset.css
@@ -4,7 +4,6 @@
   width: 100%;
   position: relative;
   --panel-tabs-border-bottom: #ddd;
-  --panel-tabs-sideways-max-width: 25%;
   --panel-tab-foreground: currentColor;
   --panel-tab-background: unset;
   --panel-tab-active-foreground: currentColor;
@@ -68,8 +67,6 @@
   color: currentColor;
   text-decoration: none;
   border: none;
-  width: 100%;
-  height: 100%;
 }
 
 .panelset .panel-tabs .panel-tab > a:focus {
@@ -113,115 +110,3 @@
 .panelset .panel-active {
   display: block;
 }
-
-/* ---- Sideways Panelset ---- */
-
-@media (min-width: 480px) {
-  .panelset.sideways {
-    display: flex;
-    flex-direction: row;
-  }
-
-  .panelset.sideways .panel-tabs {
-    box-shadow: none;
-    flex-direction: column;
-    align-items: start;
-    margin: 0;
-    margin-right: 1em;
-    border-right: 2px solid var(--panel-tabs-border-bottom);
-    max-width: var(--panel-tabs-sideways-max-width);
-  }
-
-  .panelset.sideways .panel {
-    max-width: calc(100% - var(--panel-tabs-sideways-max-width) - 1em);
-  }
-
-  .panelset.sideways .panel-tabs .panel-tab {
-    border-top: unset;
-    border-bottom: unset;
-    padding-left: 0;
-  }
-
-  .panelset.sideways.right {
-    flex-direction: row-reverse;
-    justify-content: space-between;
-  }
-
-  .panelset.sideways.right {
-  	text-align: inherit;
-  }
-
-  .panelset.sideways.right .panel-tabs {
-    align-items: end;
-    margin-right: 0;
-    margin-left: 1em;
-    border-right: unset;
-    border-left: 2px solid var(--panel-tabs-border-bottom);
-  }
-
-  .panelset.sideways.right .panel-tabs .panel-tab {
-    padding-left: 1em;
-    width: 100%;
-  }
-
-  .panelset.sideways.right .panel-tabs .panel-tab a {
-    text-align: right;
-  }
-}
-
-/*
-  This next part repeats the same CSS inside the @media query above but with
-  remarkjs-specific classes to ensure that sideways panelsets are always used.
-  In the future, we could use @container queries instead once they're availble.
-*/
-
-.remark-container .panelset.sideways {
-  display: flex;
-  flex-direction: row;
-}
-
-.remark-container .panelset.sideways .panel-tabs {
-  box-shadow: none;
-  flex-direction: column;
-  align-items: start;
-  margin: 0;
-  margin-right: 1em;
-  border-right: 2px solid var(--panel-tabs-border-bottom);
-  max-width: var(--panel-tabs-sideways-max-width);
-}
-
-.remark-container .panelset.sideways .panel {
-  max-width: calc(100% - var(--panel-tabs-sideways-max-width) - 1em);
-}
-
-.remark-container .panelset.sideways .panel-tabs .panel-tab {
-  border-top: unset;
-  border-bottom: unset;
-  padding-left: 0;
-}
-
-.remark-container .panelset.sideways.right {
-  flex-direction: row-reverse;
-  justify-content: space-between;
-}
-
-.remark-container .panelset.sideways.right {
-	text-align: inherit;
-}
-
-.remark-container .panelset.sideways.right .panel-tabs {
-  align-items: end;
-  margin-right: 0;
-  margin-left: 1em;
-  border-right: unset;
-  border-left: 2px solid var(--panel-tabs-border-bottom);
-}
-
-.remark-container .panelset.sideways.right .panel-tabs .panel-tab {
-  padding-left: 1em;
-  width: 100%;
-}
-
-.remark-container .panelset.sideways.right .panel-tabs .panel-tab a {
-  text-align: right;
-}
diff --git a/Presentations/libs/panelset/panelset.js b/Presentations/libs/panelset/panelset.js
index 730d54d..80e773c 100644
--- a/Presentations/libs/panelset/panelset.js
+++ b/Presentations/libs/panelset/panelset.js
@@ -235,7 +235,6 @@
 
       const contents = panels.map(processPanelItem).filter(o => o !== null)
       const newPanelSet = reflowPanelSet(contents, idx)
-      newPanelSet.classList = panelset.classList
       panelset.parentNode.insertBefore(newPanelSet, panelset)
       panelset.parentNode.removeChild(panelset)
 
