e<a class="anchor" aria-label="anchor" href="#reusable-code"></a>
</h2>
<p><em>Preparation.</em>   The immediate prerequisites or “intake”
required by the reusable code chunk are the source data tables.</p>
<div class="sourceCode" id="cb27"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="co"># Load source data</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/utils/data.html" class="external-link">data</a></span><span class="op">(</span><span class="va">st