<svg class="external" width="24" height="24" aria-hidden="true"><use xlink:href="#external"/></svg></span></a>
</h2>
<aside><h4>Exercises:</h4> <ul class="flat"><li class="flat__item"><a href="../../exercise/5/5.html#ex5.39">5.39</a>, </li><li class="flat__item"><a href="../../exercise/5/5.html#ex5.40">5.40</a>, </li><li class="flat__item"><a href="../../exercise/5/5.html#ex5.41">5.41</a>, </li><li class="flat__item"><a href="../../exercise/5/5.html#ex5.42">5.42</a>, </li><li class="flat__item"><a href="../