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1. a) 9-3 example 4 p.622
b) 9-4 example 5 p.629
c) 9-5 example 6 p.637
d) 9-6 example 4 p.644

2. 9-9 example 2+5 p.674

3. 9-10 example 1+2 p.679

4. 12-3 exampel 4 p.853

5. 13-3 example 4 p.910

6. 13-4 example 3 p.920

7. 13-4 example 5 p.922