HW6 grading.

10 points total.

0 points if it is not turned in the correct way, with the correct file name.

0 points if your hw6.c does not compile.  That is, if gcc hw6.c -o hw6
gives error messages.

4 points for step (2).

2 points for step (3).

2 points for step (4).

2 points for step (5).