HW2 grading.

10 points total.

0 points if filename wrong or turned in late.

3 points for getting it into the right place with the right filename.

#3, 2 points
Correct answers: 9, 32, 153
0 points if no work shown.
-.5 if at least one done completely correct and anything else is just a
    careless mistake.

#4, 2 points
Correct answers: 255, 65,535,  4,294,967,295
0 points if no work shown.
-.5 if at least one of 16, 32 bit done completely correct and anything else 
    is just a careless mistake.

#5, 2 points
Correct answers: 10010111, 1100101100101
0 points if no work shown.
-.5 if at least one done completely correct and anything else is just a
    careless mistake.


#6 , 1 point
-.5 if not correct but some reasonable-ish changes were made.


Extra credit, #7, 2 points at most

1 point if a) correct completely
Note: 10! is 362880

1 point if b) correct completely
Note: computation should output 65535