The three air carts shown in figure 9-16 have masses,reading from left to right, of 4m,2m,and m,respectively.The most massive cart has an initial speed of V0 ; the other twocarts are at rest initially. All carts are equiped with spring bumpers that gives elastic collisions.(a) find the final speed of each cart (b) Verify the final kinetic energy of the system is equal to the initial kinetic energy. (Assume the air track is longenough to accommodate all collisions.?)