Exercise:

1.

Exercise:

2.

Exercise:

3.

Exercise:

4.

Exercise:

5.

Exercise:

6.

Exercise:

7.

Exercise:

8.

Exercise:

9.

Exercise:

10.

Exercise:

11a.

Exercise:

11b.

Exercise:

12.

Exercise:

13a.

Exercise:

13b.

Exercise:

14a.

Exercise:

14b.

Exercise:

15.

Exercise:

16.

Exercise:

17.

Exercise:

18.

Exercise:

19.