This prologue is intended to help you get started thinking about the problems on exam 2.  For each of the problems, please write a short note about something that will help you solve the problem.  Mostly, we want to see some evidence that you've thought about the problem.  

You might note some similar procedures you've written in the past.  You might note procedures that you expect to use.  You might sketch an algorithm.  You might pose a question to yourself.  (We won't necessarily read this in a timely fashion, so if you have questions for your instructor, you should ask by email or in person.)  

If, when looking at a problem, you think you already know the answer, you can feel free to write something short like "solved" or "trivial".

At the end, we ask a question to help you reflect on your overall problem-solving strategies. For example, you might consider what strategies help you get "unstuck" when working on a difficult problem.