86.10 Chapter 9. The operational method. Exercise 9b at page 134

86.10.1 problem 1
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86.10.3 problem 3
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86.10.5 problem 5
86.10.6 problem 6
86.10.7 problem 7
86.10.8 problem 8
86.10.9 problem 9
86.10.10 problem 10
86.10.11 problem 11
86.10.12 problem 12
86.10.13 problem 13
86.10.14 problem 14