A ball is kicked at ground level with an initial velocity of $15$ m$/$s in the horizontal direction and $15$ m$/$s in the vertical direction.

Part $($a$)$

At what speed does the ball hit the ground in m$/$s$?$

Part b

For how long does the ball remain in the air in seconds?

Part $($c$)$

What maximum height is attained by the ball in meters?