In the Arnold's Muffler example for the exponential distribution in this chapter, the average rate of service was given as 3 per hour, and the times were ex-pressed in hours. Convert the average service rate to the number per minute and convert the times to minutes. Find the probabilities that the service times will be less than 1/2 hour, 1/3 hour, and 2/3 hour. Com-pare these probabilities to the probabilities found in the example.