Answer all of the following

The following data set refers to the number of customers per day at a store in a mall during a20-day period.

90

90

58

69

22

12

19

11

55

46

14

77

34

80

56

25

85

69

70

50

a. Identify thefirst, second, and third quartiles.

b. Determine the interquartile range.

a. The first quartile is

, the second quartile is

, and the third quartile is

.

(Type integers ordecimals.)

b. The interquartile range is

nothing

.

(Type an integer or adecimal.)