This is a paper-and-pencil problem set. You may submit it by e-mail in one of the following formats: plain text (please use .txt file name extension or write your answer directly in your e-mail message), .doc, .docx, .odt (Open Office), .rtf, .pdf. Of those, e-mail message, .txt and .pdf are preferred.
This problem set is individual. Collaboration in general terms is encouraged (for instance, working together on examples not included into the problem set), but every person must develop an independent solution to each problem below.
Please show all your intermediate work and explain the answers when required -- this is a substantial part of your grade.