2. A car travelling at a certain speed knocks down a cyclist. The driver of the car claims that he was travelling below the speed limit of 40 km/h. Police measure the skid marks made by the car at 12 m long. It is known that the maximum deceleration for this type of car is 8.0 m/s2. (a) Decide whether the car was travelling above or below the speed limit. (b) Find the time to bring the car to rest. State assumptions made to answer (a) and (b)