Exercises in Sections 4.3 and Other

0:00 - Introduction 0:23 - Exercise 6 of Section 4.3 (Comment only) 4:24 - Exercise 20 of Section 2.2 (from Quiz #2) 9:13 - Exercise 8 of Section 2.3 (from Quiz #2) 14:35 - Exercise 11 of Section 3.4 (from Quiz #2) 25:52 - Exercise 17 of Section 3.4 (from Quiz #2)