pan>
<span class="r-in"><span>  <span class="fu">summarize</span><span class="op">(</span>avg_a <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/mean.html" class="external-link">mean</a></span><span class="op">(</span><span class="va">a</span><span class="op">)</span>,</span></span>
<span class="r-in"><span>            max_b <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/Extremes.html" class="external-link">max</a></span><span class="op">(</span><span cl