">&lt;&lt;</span> <span class="identifier">expected_life</span> <span class="special">&lt;&lt;</span> <span class="string">" is "</span><span class="special">&lt;&lt;</span> <span class="identifier">cdf</span><span class="special">(</span><span class="identifier">bulbs</span><span class="special">,</span> <span class="identifier">expected_life</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
<span class="identifier"