Section 1.4, Problems 2, 17, 21.

Section 1.5, Problems 3, 8, 12, 23, 31, 42.

Section 2.1, Problems 11 d), 12 b), 32, 34.

Section 2.2, Problems 11, 17, 32, 40 b), c), e), g), 41, 42 b).

Section 2.3, Problems 1 e), 16, 20 a).