A basketball player, he releases the ball at time t=0 at a point 2.25 m above the ground. He passes the ball so that it leaves his hand moving horizontally. The ball moves a horizontal distance of 5 m before striking the ground without hitting anything.

a. At what speed does the basketball star pass the ball? (how to get answer of 7.38 m/s)

b. At what speed does the ball hit the ground? (how to get answer of 9.93 m/s)