Listen The graph shows the velocity of a motorcycle plotted as a function of time. a. Find the average acceleration of the motorcycle from 0.0 s to 13.0 s. b. Determine the instantaneous acceleration at t = 4.0 s c. How far does the motorcycle travel in the first 9.0 s? u (m/s) 50 0 2 4 6 8 10 12 14 1 (S)