8G Finish class prob (p152 #11) and do: p151 #6, and p152 #10, p159 #1b, p160 #2b

7Fa Finish class prob if you haven't yet AND do p80 #7 and
p83 #1ab; always use 3.14 for pi

6S p316 #12 all; READ p319 and DO pp320-321 #1all