36 2/3

37 1/3

38 2/3

39 1/3

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

28.5

30.5

32.5

33.5

34.5

35.5

37.5

38.5