CSC151 2007S, Class 20: Recursion, Revisited

Admin:
* I've looked at my schedule for the next few days, and there's no way that I'm going to get the first exam back to you until next week.
* I will, however, get an answer key to you in the next day or two.
* It looks like Assignment 8 did not go well.  We'll talk.
* Assignment 9 will be ready later today.
* The reading on documentation will be ready even later today.

Overview:
* Q&A.
* Lab.