Please help me answer the following question (2 sig figs!):

Problem 1 You throw a ball of mass m = 0.80 kg straight downwards with an initial speed of vi = 1.5 mfs from a height of ii:- = 2.2 III. The ball bounces off the ground straight upwards. You mold like to predict how high the ball will bounce. (a): 5 points What two major assumptions do you need to make in order to solve this problem? (b): 3 points Calculate how high the ball will bounce. {c}: 7 points What was the impulse delivered to the ball by the ground during its bounce