1. The problem statement, all variables and given/known data If you follow this link http://www.math.tamu.edu/~ciken/teaching/spring2014/math302/practice%20midterm%202.pdf [Broken] There are several optional problems that have been posted for studying for my exam. I figured it would be easier to read the original than have me try to retype it. The only ones I am concerned with are #1 and #5 2. Relevant equations 3. The attempt at a solution For number one I got the first part just fine. Would it be 4 equivalence classes? Not sure if I solved it correctly. Also, how would I go about proving this fact if I got it right. While of course a proof would be welcome, if you have a link to a resource that would show me how or just any tips really would be great! For number 5. Would it be 10 equivalence classes? Post anything you know. Unfortunately time is of the essence because exam is soon. Wish this had been posted before:( Thanks for the help!