Because the problem sets are designed to be learning experiences, you are allowed, indeed encouraged to work on them cooperatively. Group learning can be a very effective way of mastering intermediate theory. However, each of you must actually write out the answers to your own submission. Moreover, simply copying out the group answer without being able to arrive at that answer yourself it will not help you prepare for the examinations where individual facility with the material is a must. Examinations will require that you not only understand the material, but that you solve actual problems such as those on the problem sets, without help.
All problem sets are due at the beginning of the class hour on the due date.
I will normally give each student one extension during the semester as long as I am asked in advance. Use it wisely. Here are some suggestions for finding and presenting the answers to problem set questions. The first step in solving many problems in intermediate theory is to sketch out the graph. Often finding the answer qualitatively on a graph is the best route to finding the quantitative answer.