help and explanation with statistics practice exam using excel please

Lily decided to open a new store in Fox hill mall . He wanted to know the average amounta customer spent per shopping visit by customer. A sample of 29 customers reveals the following amount spent ($). Construct a 98% confidence interval for the population mean. Would it be reasonable for Richard to conclude that the mean amount spent per customer is $79.

63

89

89

72

89

86

39

79

59

78

201

96

98

29

97

78

77

69

86

98

68

95

99

102

88

39

49

96

59