This document has answers to the problems from the course pack. Some are answers only, and some have a little more explanation; I’ve tried my best to make sure that the question numbering matches the course pack itself, but since the course pack changes slightly every semester there might be the odd discrepancy. Note that this pack doesn’t cover discussion prompts, despite the fact that I think they are very important to test your understanding. The reason is that the discussion prompts are typically subjective, with no single correct approach or answer, and so I prefer you to think through them independently or with classmates rather than me leading you in any particular direction. Finally, I strongly encourage you to try the problems yourself or watch the demonstrations of them in class or section before you turn to the answers here. If you look at the answers too soon, it can be too easy to convince yourself that you could have gotten the answer! The places where you are less confident will reveal what you need to study a little more, and working on the problems yourself will make you remember the techniques better.