The remaining problem sets are the problems on pages 141-143 of the textbook. Remember that you have to turn in any 3 problems on or before Friday, December 23rd. I recommend turning them in earlier than that, because we also have an exam on the 23rd.
You may do problem sets in your assigned groups and turn in the work as a group. If you do so, a member of your group (chosen by me) may be asked to present the solution orally. This oral presentation will impact the grade of everyone in the group.