The position x of a car on a track at timet is X=2t^3-4t^2-6t+50 where x is measured in meters and time tis measured in seconds. A) Calculate the velocity and acceleration functions B) Calculate the positive time t > 0 at which the velocity v of the car is 0 m s-1 C) Calculate the acceleration a of the car, with units, at this same time when the velocity is zero. D) Make graph of the velocity and acceleration functions and highlight those points