Q4: A child travels down a water slide, leaving it with a velocity of 4.2 m's horizontally, as in Figure. The child then experiences projectile motion, landing in a swimming pool 3.2 m below the slide. (a) For how long is the child airborne? (b) Determine the child's horizontal displacement while in the air. (c) Determine the child's velocity upon entering the water. [15 marks total, 5 marks each] show all your work. 3.2 m