0
student
0
0
1
0
0
0
0
0
0
0
2
0
0
2
0
0
0
0
0
0
0
0
1
6
2
0
0
5
0
2
1
0
3
1
0
1
0
6
3
3
0
4
0
1
14
2
3
1
3
05:00
4
08:00
4
07:00
3
00:17
2
00:29
3