Computer Science question

<p>Computer Science help(CSC 2010)?
I have no idea how to do the ones with a check next to them. 3,7, and 9. Here
<a href="http://tinman.cs.gsu.edu/%7Ebsrichandan1/slides/Homework-ch1.pdf%5B/url%5D"&gt;http://tinman.cs.gsu.edu/~bsrichandan1/slides/Homework-ch1.pdf&lt;/a>
Here is Figure 1.2 for number 3.
<a href="http://img291.imageshack.us/img291/986/figure12.png%5B/url%5D"&gt;http://img291.imageshack.us/img291/986/figure12.png&lt;/a>
Can you help guide me?</p>