help part c only

(10%) Problem 9: A runner is initially at rest at the starting line of a 100 m race. When he hears the starting gun, he accelerates at a constant rate of ai = 0.55 m/s , which he maintains Vo = 0 12 = 0 until he crosses the finish line at time t = $1 . It then takes him an additional 8.5 s to come to a complete stop at time t = 12. Use the given coordinate system where x is positive to the right. Refer to the figure. 1 =0 t = t1 t = tz Otheexpertta.com