20.20

1 1 

2 2.2 

3 3.3 

4 4.4 

5 5.5 

6 6.6 

7 7.7 

8 8.8 

9 9.9 

10 introduction 

11 10.10 

12 CU 11.11 

13 12.12 CU 2 

14 13.13 CU 3 

15 14.14 CU 4 

16 15.15 CU 5 

17 16 . 16 

18 17.17 

19 18.18 

20 19.19 

21 20.20 

22 21.21 CU 1 

23 22.22 CU 2 

24 23.23 CU 3 

25 24.24 CU 4 

26 25.25 CU 5 

27 26.26 

28 27.27 

29 28.28 

30 29.29 

31 30.30 

32 31.31 

33 32.32 

34 33.33 

35 34.34 

36 35.35 

37 36.36 

38 37.37 

39 38.38 

40 39.39 

41 40.40 

42 41.41 

43 42.42 

44 43.43 

45 44.44 

46 45.45 

47 46.46 

48 47.47 