10.1 problem 1
  10.2 problem 2
  10.3 problem 3
  10.4 problem 4
  10.5 problem 5
  10.6 problem 6
  10.7 problem 7
  10.8 problem 8
  10.9 problem 9
  10.10 problem 10
  10.11 problem 11
  10.12 problem 11
  10.13 problem 12
  10.14 problem 13
  10.15 problem 14
  10.16 problem 15
  10.17 problem 16
  10.18 problem 19
  10.19 problem 20
  10.20 problem 21
  10.21 problem 22
  10.22 problem 23
  10.23 problem 24
  10.24 problem 25
  10.25 problem 26
  10.26 problem 27
  10.27 problem 28
  10.28 problem 29
  10.29 problem 30
  10.30 problem 33
  10.31 problem 34
  10.32 problem 35
  10.33 problem 36
  10.34 problem 37
  10.35 problem 38
  10.36 problem 39
  10.37 problem 40
  10.38 problem 45