.A bus starts moving from rest at origin and accelerates at 2m/s2 for 3s. Next, it moves at constant velocity for 4s and then slows down to a stop at a rate of 3m/s?. It remains stationary for 4s. Then turns backward and starts moving from rest to reach a speed of 8m/s in 4s(while moving backward). - Perform all needed calculations to determine the exact positions, velocities and accelerations. - Then, based on your results a) Plot a = a (t) graph. b) Plot v = v(t) graph; c) Plot x = x(t) graph;