A block of mass m = 2.20 kg slides down a 30 degree incline which is 3.6 m high. At the bottom it strikes a block of mass M = 7 kg which is at rest on the horizontal surface. If the collision is elastic and friction can be ignored, determine the: speeds of the two blocks and how far back up the incline the smaller mass will go. Does this involve collisions in two dimensions? Please respond with any help if you can. Thanks.