Pls help me

a. Sketch a copy of the actual position and velocity graph, only for the time where the cart was rolling down the track. What are the shapes of the graphs? Why? b. Sketch a copy of the actual kinetic and potential energy graph, only for the time where the cart was rolling down the track. What are the shapes of the graphs? Why? c. What is the total sum of the kinetic and potential energies at the top of the ramp when the cart is released? At the bottom? How are their changes related to each other? d. What is the speed at the bottom of the ramp? Try adding a mass to the cart and take another set of data. How does the speed change? Why? 36