d><p>first element in the first range to merge </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">first2</code></span></p></td>
<td><p>first element in the second range to merge </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">last1</code></span></p></td>
<td><p>last element in the first range to merge </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">last2</code></span></p></td>
<td><p>last element in the second range to merge </