Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a long period of time, it has been determined that the police response time has a normal distribution with a mean of7.2minutesand a standard deviation of2.1minutes.For a randomly received emergency call, find the following probabilities. (For each answer, enter a number. Round your answers to four decimal places.)

(a)the response time is between3and9minutes

(b)the response time is less than3minutes

(c)the response time is more than9minutes