Exercise 4.1

• Question no 1 and 2 14:58
• Question no 3 9:59
• Question no 4 12:02
• Question no 5 and 6 10:59
• Question no 7 16:18
• Question no 8 and 9 10:58

Exercise 4.2

• Introduction Exercise 4.2 18:07
• Question no 1 and 2 16:20
• Question no 3 and 4 9:26
• Question no 5 and 6 14:10
• Question no 7 and 8 13:29
• Question no 9 and 10 15:04
• Question no 11 12:42
• Question no 12 10:27
• Question no 13 and 14 21:17

Exercise 4.3

• Question no 1 16:34
• Question no 2 14:52
• Question no 3 to 6 24:23
• Question no 7 to 9 17:18