I have posted the solutions to the second problem sheet.
The TA has informed me that only 3 students submitted solutions. This is very disappointing. He also told me that many people haven't even bothered to pick up their marked solutions to the first sheet. That is also rather disappointing.
Thus far, only three people have expressed any interest in a problem session. Hopefully, interest in such a class will prove a little bit wider than that. You can e-mail me or post a comment here to let me know if you are interested in attending such a class.