i

1

62

1.5

2.25

2

52

-8.5

72.25

3

67

6.5

42.25

4

78

17.5

306.25

5

47

-13.5

182.25

6

55

-5.5

30.25

7

57

-3.5

12.25

8

44

-16.5

272.25

9

58

-2.5

6.25

10

48

-12.5

156.25

11

77

16.5

272.25

12

82

21.5

462.25

13

43

-17.5

306.25

14

63

2.5

6.25

15

59

-1.5

2.25

16

61

0.5

0.25

17

66

5.5

30.25

18

61

0.5

0.25

19

76

15.5

240.25

20

54

-6.5

42.25

2445

n

20

128.68

s

11.34