Added Class 6 HW

At last fixed local GA DS DC 2 repo. Pushing Class 6 HW. Thanks! -AV
It looks like the goals of this for loop were to calculate the number of rows and number of columns, and also save the header row... right? But it doesn't look like those were used elsewhere in the code.

Also, here would be simpler ways to create those variables if you did need them:
header = health_1[0]
rownum = len(health_1)
colnum = len(health_1[0])