Exercise 4.1
Question 1
Question 2
Exercise 4.2
Question 1
Question 2
Question 3
Question 4
Exercise 4.3
Question 1
Question 2
Exercise 4.4
Question 1
Question 2
Exercise 4.5
Question 1
Exercise 4.6
Question 1
Question 2
Exercise 4.7
Question 1
Question 2
Exercise 4.8
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Question 13
Question 14
Question 15
Question 16
Question 17
Question 18
Question 19
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