The Highway Patrol, using radar, checked the speeds (in mph) of 30 passing motorists at a checkpoint. The results are listed below. Construct a frequency distribution, a relative frequency distribution, and a cumulative frequency distribution using six classes.

44 38 41 50 36 36 43 42 49 48 35 40 37 41 43 50 45 45 39 38 50 41 4 47 36 35 40 42 43 48 33