3. A rubber ball is dropped onto the concrete floor. The 220g ball hits the floor travelling downward at 4.0m/s. The ball rebounds from the floor at

Please help me with these physics problems. I do not understand momentum or impulse. Thanks

3. A rubber ball is dropped onto the concrete floor. The 220g ball hits the floor travelling downward at4.0m/s. The ball rebounds from the floor at 3.2m/s. The ball is in contact with the floor for 0.060s.A. What is the change in the velocity of the ball?B. What is the change in the momentum of the ball?C. What impulse does the ball experience?D. What is the average net force that is applied to the ball while in contact with the ground?E. Make a sketch of net force vs. time for the ball from the time it is dropped until it rebounds backto maximum height.F. What is the average force exerted by the ground on the ball?G. Was the momentum of the ball conserved? Explain.H. Was momentum conserved? Explain.