Prob 1 - 2
Prob 2 - 2
Prob 3 - 3
Prob 4 - 3

Points taken off:

A - Timer doesn't work at all (-3)
B - Timer doesn't refresh properly (-1)
C - No slider bars, or they don't work (-3)
D - In problem 2, squares were displayed one at a time instead of on top
of each other (-2)