The temperature, in degrees Celsius, each day recorded as follows:over a three-week period was 17, 18, 20, 22, 21, 19, 16, 15, 18, 20, 21, 21, 22, 21, 19, 20,

19, 17, 16, 16, 17 Compute the mean, median, and mode. (b) Using two-degree intervals starting with 15-16, draw a frequency diagram.