First of all, for some reason quiz 3 didn’t arrive to the MLC. Today I made sure that it got there so you can pick it up. Quiz 4 is also there waiting for you.
As for common mistakes in quiz 4, there weren’t that many apart for calculation errors. In question 3 some people mistakenly compared the elasticity to 0 instead of -1 and in question 4 forgot that x=0 is also a critical point.
Use your time well to study for the midterm. It is going to be on Thursday November 17th on 6:45-7:45 at the same place as the first midterm, that is Buchanan A203. Please make sure that you bring your student card to the test and pleas arrive to the right place (I’m going to be there!).
I would also like to remind you of the various resources you can use when studying for the midterm: