33:00
0
students
35:00 0
22:00
16
05:00
1
12:00
0
10:00
0
14:00
0
00:24
0
10:00
2
14:00
1
05:00
0
08:00
4
04:00
1
05:00
4
00:31
0
10:00
9
08:00
24
12:00
1
07:00 10
05:00
17
06:00
191
02:00 148
06:00 9
12:00
5
06:00 4
05:00
10
07:00 5
07:00
9
00:10
868