36 A car moves along an x axis through a distance of 900 In, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the rst i of that distance, its acceleration is +2.25 m/s2. Through the rest of that distance, its acceleration is 0.750 m/s2. What are (a) its travel time through the 900 m and (b) its maximum speed? (c) Graph position x, velocity v, and acceleration (1 versus time t for the trip