5. At a soccer match, a player used his head to (unintentionally ) deflect a ball straight up, and 0.5 seconds later, it came back down and struck the player on the head a second time. Give your answer to 2 significant figures. Use g = 10. m/$2 (a) Find the initial vertical speed up of the ball in units of m/s. (b) Find the maximum height Amax that it reached assuming the head of the player is 2m above the ground