A car moves along an x axis through a distance of 910 m, starting at rest (at x = 0) and ending at rest (at x = 910 m). During the first 1/4 of that distance, its acceleration is +6.25 m/s2. During the next 3/4 of that distance, its acceleration is -2.08m/s2. What is (a) its travel time during the 910 m and (b) its maximum speed?