Awalgreens manager compared the numbers of hours different pharmaceutical technicians worked over one week. the table shows the number of hours worked per technician.

hours per server: 20, 21, 14, 21, 21, 12, 18, 23, 20, 23, 12

construct a dot plot to represent the data, and determine which of the following is correct.

a. q1 is 13
b. q3 is 21.5
c. the interquartile range is 9
d. the data has no outliers