20.2 Chapter 2, section 8, page 41

20.2.1 problem 1
20.2.2 problem 2
20.2.3 problem 3
20.2.4 problem 4
20.2.5 problem 5
20.2.6 problem 6
20.2.7 problem 7
20.2.8 problem 8
20.2.9 problem 9
20.2.10 problem 10
20.2.11 problem 11