2.1 Chapter 1. section 5. Problems at page 19

2.1.1 Problem 2
2.1.2 Problem 3
2.1.3 Problem 4
2.1.4 Problem 5
2.1.5 Problem 6
2.1.6 Problem 16 (a)
2.1.7 Problem 16 (b)
2.1.8 Problem 17 (a)
2.1.9 Problem 18