URGENT i dont understand how to do this can someone help me A 0.35 kg ball is dropped to the floor, and is in contact with the floor for 0.60 seconds.

a.) If the ball is dropped from a height of 1.2 m, what is the velocity of the ball right before it hits the ground?

b.) What is the force of the ball on the ground?

c.) What is the force of the ground on the ball?

d.) What is the change in momentum from the point when the ball is dropped until it hits the floor?