I have started to lecture ¡­

I have started to lecture Chapter 2. Exercises that might be solved in the weeks to come: 2.2.1 (page 55): ex. 1, ex. 4. 2.4.3 (page 62): ex. 4, ex. 5, ex. 6. 2.7.1 (page 76): ex. 4, ex. 5, ex. 6, ex. 7. 2.8.1 (page 81): ex. 2, ex. 4, ex. 5, ex. 6, ex. 5, ex. 8.