05:25
4
student
00:57
0
13:57
0
16:12
0
13:06
0
05:11
1
12:04
1
08:12
0
04:06
0
13:09
0
13:05
0
09:00
0
36:08 3
59:41 0
24:22 2
36:41 0
30:41 1
11:08 5
27:09 2
52:17 5