lass="o">*</span><span class="n">at</span>
    <span class="n">apr</span> <span class="o">=</span> <span class="p">(</span><span class="mi">1</span> <span class="o">+</span> <span class="n">G</span><span class="p">)</span><span class="o">*</span><span class="n">ar</span>
    
    <span class="n">Cpt</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sqrt</span><span class="p">(</span><span class="n">apt</span><span class="o">**</span><span class="mi">2</span> <s