Exam 2.
Section 15.2: 7, 9, 11, 19, 27, 31.
Section 15.3: 13, 29, 35, 41, 53, 67, 69, 71.
Section 15.4: 1, 3, 5, 23.
Section 15.5: 1,3, 5, 7, 9, 21, 23
Section 15.6: 7, 9, 11, 13, 19, 21, 23, 29, 39, 41, 47.
Section 15.7: 5, 7, 17, 27, 29, 33.
Section 15.8: 3, 5, 7, 19, 41.
Section 16.1: 11, 13.
Section 16.2: 3, 5, 13, 21, 25.