6.1 problem Exercise 12.1, page 103
  6.2 problem Exercise 12.2, page 103
  6.3 problem Exercise 12.3, page 103
  6.4 problem Exercise 12.4, page 103
  6.5 problem Exercise 12.5, page 103
  6.6 problem Exercise 12.6, page 103
  6.7 problem Exercise 12.7, page 103
  6.8 problem Exercise 12.8, page 103
  6.9 problem Exercise 12.9, page 103
  6.10 problem Exercise 12.10, page 103
  6.11 problem Exercise 12.11, page 103
  6.12 problem Exercise 12.12, page 103
  6.13 problem Exercise 12.13, page 103
  6.14 problem Exercise 12.14, page 103
  6.15 problem Exercise 12.15, page 103
  6.16 problem Exercise 12.16, page 103
  6.17 problem Exercise 12.17, page 103
  6.18 problem Exercise 12.18, page 103
  6.19 problem Exercise 12.19, page 103
  6.20 problem Exercise 12.20, page 103
  6.21 problem Exercise 12.21, page 103
  6.22 problem Exercise 12.22, page 103
  6.23 problem Exercise 12.23, page 103
  6.24 problem Exercise 12.24, page 103
  6.25 problem Exercise 12.25, page 103
  6.26 problem Exercise 12.26, page 103
  6.27 problem Exercise 12.27, page 103
  6.28 problem Exercise 12.28, page 103
  6.29 problem Exercise 12.29, page 103
  6.30 problem Exercise 12.30, page 103
  6.31 problem Exercise 12.31, page 103
  6.32 problem Exercise 12.32, page 103
  6.33 problem Exercise 12.33, page 103
  6.34 problem Exercise 12.34, page 103
  6.35 problem Exercise 12.35, page 103
  6.36 problem Exercise 12.36, page 103
  6.37 problem Exercise 12.37, page 103
  6.38 problem Exercise 12.38, page 103
  6.39 problem Exercise 12.39, page 103
  6.40 problem Exercise 12.40, page 103
  6.41 problem Exercise 12.41, page 103
  6.42 problem Exercise 12.42, page 103
  6.43 problem Exercise 12.43, page 103
  6.44 problem Exercise 12.44, page 103
  6.45 problem Exercise 12.45, page 103
  6.46 problem Exercise 12.46, page 103
  6.47 problem Exercise 12.47, page 103
  6.48 problem Exercise 12.48, page 103
  6.49 problem Exercise 12.49, page 103
  6.50 problem Exercise 12.50, page 103