The rules are simple. 30 minutes with me - C. 40 - B. 50 - A. How much do you want to be an A student?

12 40

37 46

31 41

17 40

20 40

18 10

37 44

34 42

20 40

29 42

7 0

5 10

16 10

17 10

43 10

3 0