The police department of a major city needs to update its budget. for this purpose, they need to understand the variation in their fines collected from motorists for speeding. as a sample, they recorded the speeds of cars driving past a location with a 35 mph speed limit, a place that in the past has been known for producing fines. the mean of 100 representative readings was 38.74 mph, with a standard deviation of 3.31 mph. a) how many standard deviations from the mean would a car going the speed limit be? b) which would be more unusual, a car traveling 48 mph or one going 25 mph?