Homework 27 has a mighty, mighty brain burner.

The last regular homework assignment of the semester is now up, Homework 27. As always, it is due on Monday at the normal times. It contains a real brain burner that, if you can understand the correct answer, you will have put together concepts from August and December. Good.

Start discussion threads on the brain burner, and we can sort it out.

More HW coming, the mega-combo review. Maybe later tonight -- I have to catch some zzzzz right now.