class 4 general science

28:36

30:16

6:50

29:11

6:26

1:12:12

8:17

16:01

6:34

13:40

12:37

46:41

46:16

51:58

5:24:53

3:00:45

7:10

18:59

10:16

23:20

17:55

43:58

12:35

16:19

24:13

20:03

5:36

22:31

8:02

52:01

53:37

9:54

10:08

38:15

11:40

8:57

20:41

1:10:05

31:00

15:36

20:51

13:15

12:38

20:04

2:33:44

8:25

3:01:41

11:04

6:21

1:38:28

14:00

20:10

2:06:19

55:55

33:31

10:27

1:30:28

2:37:57

13:46:19

47:55