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</li>
<li>What does the <b><code><span style="color:#3366CC;font-size:1.2em;">z</span></code></b> option do?</li>
<li>Compare the sizes of <b><code><span style="color:#3366CC;font-size:1.2em;">/tmp/archive1.tar.gz</span></code></b> and <b><code><span style="color:#3366CC;font-size:1.2em;">/tmp/archive2.tgz</span></code></b>. Why are they so close in size?</li>
</ol>