Section 7.4: 7.4.7, 7.4.8, 7.4.10, 7.4.11, 7.4.17, 7.4.20, 7.4.21, 7.4.22
Problem Set # 4 (due Friday, 15 March):
Problems 6.5.2, 6.5.5, 7.3.2, 7.3.4