The Highway Patrol, using radar, checked the speeds (in mph) of 30 passing motorists at a checkpoint. The results are listed below: 44 38 41 50 36 36 43 42 49 48 35 40 37 41 43 50 45 45 39 38 50 41 47 36 35 40 42 43 48 33 a) The mean speed of the cars was: b) The median speed of the cars was: c) The standard deviation for the data sample is Round your answers to the nearest tenth of a mile per hour