It's 12:30 and I've been reading the book all day. The book has only problems and no explanations, so I've been looking at Oxford, Cornell, and UW student pages for help and clear examples.

I'm going to study for another 30 minutes then sleep at 1.00. Wake up at 6.30 and be out of the room by 7.30. Breakfast and cramming before the 9 o'clock midterm. Wish me luck.