The following 36 scores are the distances (to the nearest foot) that middle school boys threw a discus in a recent cross-country meet:

69, 108, 70, 59, 86, 67, 54, 82, 95

56, 74, 66, 74, 86, 82, 52, 87, 90

89, 60, 83, 50, 76, 86, 101, 93, 98

102, 79, 63, 87, 88, 93, 58, 83, 65

a. Create a grouped frequency table in 5-ft intervals.

b. Create a grouped frequency table in 10-ft intervals.

c. Create a grouped frequency table in 20-ft intervals.

d. Which table gives the clearest picture of the data?