82

-69

76

(a)  

29

80

-94

(a)  

75

88

93

(a)  

16

40

-23

(a)  

38

10

98

(a)  

75

-14

65

(a)  

60

42

83

(a)  

48

30

-29

(a)  

47

36

-54

(a)