08:12
0
student
28:41
4
05:05
3
06:05
4
09:03
2
07:15
3
04:11
6
13:04
5
06:20
10
02:32
8
02:13
5
10:11
12
29:45
16
03:16
6
07:57
10
21:25
6
10:59
14
05:01
8
11:12
9
11:22
9