Nogan Airport has three runways. Two runways for departing flights and one runway for arriving flights. If used for departure, a runway can serve 10 flights per hour; if used for arrival, a runway can serve 15 flights per hour. The coefficient of variation of the time to use a runway (either to depart or to land) is 1. The time between two consecutive departing flights is exactly 5 minutes. The time between two consecutive arriving requests is on average 10 minutes with coefficient of variation of 1. When an arriving flight approaches the airport, it radios the control tower and requests to land. The air traffic controller responds instantly by assigning the plane a position in the queue on a first-come-firstserve basis. On average, how much time elapses between a planes radioing of the control tower and its eventual completion of the entire arriving process in the morning? On average, how much time elapses between a planes scheduled departure time and its eventual completion of the entire departing process in the morning?