An athlete is training on a 100 m long linear track. Hi5 motion is described by the graph of his position vs. time, below. X(1'l'l) (a) For each segment of the graph, find the magnitude and direction of the athlete's velocity. diroction vA direction v.3 drroction vc direction no ([3) What are the magnitude and direction of the athlete's average velocity over the entire 60 5 interval? direction