Note that only Sec3.1 Nrs. 17, 18, 19 are due Wednesday, since I was 
unable to do an example in class today. Thus the second batch,
Sec.3.1 Nrs. 34, 36, 38, 40 and 42 are due on Friday. This corrects the
following message, which, not being in .html, is difficult to edit.
<p>
<img src="chp3.gif">