exercises for Mon Oct 5

1. On Mon Sept 28 we went through several exercises, including Nils Exercises 12, 13, and Lethal Dose 4.12 from the book. We also discussed matters related to Ch 4 in particular, and I started explaining the themes of Ch 5.

2. I've uploaded a new pdf for the Nils Collection, now with 15 exercises.

3. For Mon Oct 5, we do Nils Exercises 14, 15, and CLP 4.3.