Desperate!! Help me...(Calc BC question)

<p>Hi guys… please help me. Here is the BC problem…</p>

<li>Find the area of the region enclosed by y=sin(x), x=3pi/4 on [0,3pi/4]. </li>
<li>Find the volumes of the shapes created by revolving this region about the indicated lines:
a) x=pi
b) y=2</li>
</ol>

<p>Many many thanx in advance!!</p>