05:09 2
instructor
05:09 
06:55 1
06:19 0
06:55 2
06:20 0
06:19 1
05:11 1
08:00 4
06:31 0
06:32 0
11:00 1
05:19 0
05:02 0
05:19 0
05:01 0
06:20 1
08:00 0
10:05 0
06:15 0
05:18 0