06:18
0
student
47:52
1
22:06
2
05:25
2
08:05
10
18:25
4
02:55
5
12:13
7
41:54
9
31:24
14
21:10
16
08:12
3
16:04
15
08:23
11
09:14
16
23:08
20
10:45
15
19:55
16
08:12
17
28:41
8