10.Plot a graph to show the acceleration of a car that starts from rest. After 5 s, it is going at 10 km/h. After 10 s, it is going at 20 km/h. And after 20 s, it has accelerated to 40 km/h. If it keeps accelerating at the same rate. How fast will it be going after 30s? (NOTE: VELOCITY as y-axis and TIME as x-axis) Describe the acceleration of the car.