05:07
7
student
14:03
2
05:42
1
11:57
2
19:07
2
12:38
0
06:18
4
30:16
1
05:27
1
13:33
0
20:07
3
42:08
1
31:16
2
16:41
2
09:44
1
24:46
0
09:56
0
12:17
2
11:29
0
18:46
0
