Do the same with the this year's and last year's midterms.
Here are some additional problems from the book that you should be able to do:
14.1
14.2
14.3c,d,e
14.4
14.6
14.7
14.11
15.1
15.2
15.4
15.11
15.12
16.2
16.3
17.1
17.2
17.3
17.4
17.5
17.8
21.2
21.4
21.5
21.8
21.9
21.10