6.1 Exercise 14.2 in the textbook.
6.2 Exercise 14.8 in the textbook.
6.3 Exercise 14.10 in the textbook.
6.4 Exercise 15.1 in the textbook.
6.5 Exercise 15.2 in the textbook.
6.6 Exercise 15.4 in the textbook.
6.7 Exercise 17.5 in the textbook.
6.8 Exercise 17.9 in the textbook.
6.9 Exercise 17.11 in the textbook.
6.10 Exercise 17.14 in the textbook.