Homework 5.5 Due 5/9

Looking over the last few chapters, I found few suitable problems to assign. I also have heard back from people that had difficulty with HW 5 and were anxious to get more time for it. Thus, I'm assigning "Homework 5.5" as the final homework set.

"C-level" problems (25 points): Problem 22.1, 22.5, 22.8, 24.12
"B-level" problems (10 points): Problem 20.3, 20.14, 27.6

"A-level" problems (5 points): Problem 21.15, 26.18 (Use GalCrash instead of the galaxy merger code in the book. Find the settings that most closely approximate the ones in the book.)