A car is moving in a straight line at a velocity of 12 m/s. It accelerates uniformly to 36 m/s in 30 seconds. It then decelerates uniformly to a stop over a period of 20 seconds. The car then turns around and starts to move in the opposite direction and accelerates uniformly to 18 m/s in 10 seconds. Use a ruler to prepare a scaled chart of time (s) versus velocity (m/s) and determine the maximum displacement (m with no decimal places) of the car with respect to its initial position for the above motion.