HW 12 (Due 11/28)

13.1: 2, 8, 11, 16, 24, 29 (Optional: 11, 12, 14, 17, 21)
13.2: 3, 6, 10, 14, 19, 40 (Optional: 7, 16, 17, 18, 41)
13.3: 6, 8, 15, 20, 23 (Optional: 3, 12, 16, 25, 26)