A car is sitting at a stoplight. When the light changes, the car accelerates at a rate of 11.8 m/s2 until it reaches the speed limit of 30 mph. The car maintains this speed for 4.9 s, at which time the driver sees the next stoplight turn red and immediately begins to decelerate steadily, coming to rest 7.0 s later. What is the distance between these successive stoplights