16. At t = O. a stationary police car is passed lav a speeding sports car. This occurs on a straight highway. Their subsequent velocities are shown in a vt graph. Use the graph to solve the following problems. [10] {a} Prove that the police car overtakes the sports car when t = 60 s. {to} Determine the average velocity at which the police car travels during this 60 s time interval. [c] Find the distance between the two cars when t= 30 s. [d] Find the acceleration of the sports car when t: 30 s