32:00
0
student
05:00
0
10:00
0
02:00
0
10:00
1
11:00
9
15:00
1
02:00
0
22:00
12
13:00
18
10:00
4
00:50
10
22:00
28
26:00
33
00:50
3
42:00
60
27:00
29
00:50
13
00:34
44
00:30
44
10:00
5
00:49
16
22:00
29
00:50
0
01:04:00
93
17:00
35
06:00
7
10:00
54
10:00
482
10:00
774
12:00
5
08:00
41
07:00
50
00:13
5
06:00
4
10:00
10
12:00
3
08:00
15
08:00
22
07:00
0
11:00
15
12:00
18
00:53
4
00:20
5
13:00
67
12:00
2
09:00
205
12:00
15
08:00
41
06:00 6