7.* (a) Sketch a motion diagram and a position-versus-time graph for the motion of a cart attached to a spring during one period. It passes at high speed through the equilibrium position at time zero. (b) Sketch a velocity- versus-time graph for the cart. (c) Sketch an acceleration-versus-time graph for the cart. (d) Draw another representation of the process; explain how this representation allows you to learn more about the process than the kinematics graphs do.