a look at the following code chunk:</p>
<pre class="r"><code>penguins %&gt;% 
  group_by(year) %&gt;% 
  summarize(bill_length_mm = sd(bill_length_mm, na.rm = TRUE),
            bill_depth_mm = sd(bill_depth_mm, na.rm = TRUE))</code></pre>
<div class="panel panel-default">
<div data-label="question-1" class="tutorial-question panel-body">
<div id="question-1-answer_container" class="shiny-html-output"></div>
<div id="question-1-message_container" class="shiny-html-output"></div>
<div id="question-1-action_b