6. Below is shown a plot of acceleration (m/s') vs. time (s) for an object. Take the object's initial velocity to be zero. Use this to answer the following questions. acceleration vs. time N acceleration (m/s^2) 0 1 2 3 6 7 9 time (s) (a) Find the object's velocity at time t = 5.0s. (b ) Find the object's velocity at time t = 8.0s. (c) Find the object's displacement between t = 0s and t = 5.0s. (d) Find the object's displacement between t = 0s and t = 8.0s