Problems from sections 1.4 and 1.5 mentioned in homework #1

Section 2.1, Problems 5, 11 d), 12 b), 25, 30, 36

Section 2.2, Problems 6, 14, 19, 27, 34, 38

Section 2.3, Problems 11, 12, 15, 19 c) d), 25, 30