chapter 11 exercise 113

48:41

21:43

1:04:57

38:41

7:26

10:50

8:22

20:32

1:55

1:24

43:40

4:35

6:45

2:59

1:17:15

33:28

1:31:05

8:20

1:10:45

6:03

12:31

1:38:06

10:01

2:19:08

1:04:40

1:35:20

10:14

1:08:09

1:37:24

12:33

33:51

53:50

26:44

59:42

4:16

8:42

2:13:46

12:02

51:08

24:02

9:15

24:00

7:36

3:13

20:18

5:02

7:43

16:37

1:20:56

3:33

6:45

3:01

6:30

13:11

2:15

2:45

5:11

13:03

13:08

12:54