Answers to Exercises

Exercise 1 (Chapter 7)

Exercise 2 (Chapter 8)

Exercise 3 (Chapter 9)

Exercise 4 (Chapter 10)

Exercise 5 (Chapter 11)

Exercise 6 (Chapter 12)

Exercise 7 (Chapter 13)

Exercise 8 (Chapter 14)

Exercise 9 (Chapter 15)

Exercise 10 (Chapter 16)

Exercise 11 (Chapter 17)

Exercise 12 (Chapter 18)

Exercise 13 (Chapter 19)

Exercise 14 (Chapter 20)

Exercise 15 (Chapter 21)

Exercise 16 (Chapter 22)

Exercise 17 (Chapter 23)

Exercise 18 (Chapter 24)

Exercise 19 (Chapter 25)

Exercise 20 (Chapter 26)

Exercise 21 (Chapter 27)

Exercise 22 (Chapter 28)