20:42
10
student
09:13
16
13:04
5
10:35
134
13:06
40
10:42
6
06:59
5
25:33
10
13:56
3
06:01
7
01:31
1
10:34
8
06:00
9
30:00
3
11:00
1
11:00
4
10:00
4
15:00
0
10:00
1
10:00
1
24:00
7
12:00
0
33:00
2
10:00
0
11:00
1
10:00
1
10:00
0
02:01
0
10:33
2
20:05
21