34:40
students
27:00
10:00
14:00
01:45:00
04:00
07:57
01:28
06:00
33:00
01:30
03:00
03:00
05:00
07:00
08:00
01:30
07:27
02:00
07:00
13:00
05:00
10:20
06:00
12:00
12:07
11:00
01:30
05:00
10:20
12:00
01:07