Solutions to Homework 9 are available here. I apologise that they are so late.
I have also corrected an error in the z integral in the first example of the lecture notes for last week (many thanks to the student who pointed this out to me!).
I will read over your solutions as quickly as I am reasonably able to, but suggest that in the meantime you compare them to the solutions on the webpage.
I will have office hours tomorrow from 11 -- 12 in the MAC and then 1 -- 2 in Bahen 2139.
See you tomorrow!
Nathan