Sessions 7, 8, 9 Homework

Homework for the last three sessions (7,8,9)
There are at least a couple of ways to implement this, and Chris was just looking to see if students could come up with another way. The most efficient way in your case is:
def intsum2():
    return intsum()
</humor> (python does not have a good way to do this :( So, I resort to html.)