Here is the generic grading scheme for problem set 3:

Deductions:

A - reshape doesn't work properly (-1)
B - zoom doesn't work properly (-1)
C - keyboard handler doesn't work properly (-1)
D - zoom is backwards (-1)
E - didn't compile (-1)
F - no problem 4 (-1)
G - no problem 3 (-2)
H - no problem 6 (-2)
I - no rectangle outline in problem 2 (-1)

Problems were worth:
1 - 1
2 - 2
3 - 2
4 - 1
5 - 2
6 - 2