exercise 4a question 55 to 59

27:23

47:20

1:30:07

57:03

7:26

3:25

9:13

2:25

45:00

22:21

45:41

40:59

13:56

20:50

11:28

18:09

37:03

25:00

22:23

25:18

11:18

1:18

3:16

8:38

4:48

18:04

7:43

3:56

1:02:58

12:57

4:41

55:32

8:02

1:46

23:39

10:46

13:07

7:12

25:58

31:03

9:08

5:26

13:43

8:35

6:32

7:50

8:30

22:41

38:09

5:17

7:25

3:24

7:12

38:40

36:48

31:44

27:47

4:43

3:44

13:36