A student throws a water balloon vertically downward from the top of a building

A student throws a water balloon vertically downward from the top of a building. The balloon leaves the thrower’s hand with a speed of 60.0m/s. Air resistance may be ignored,so the water balloon is in free fall after it leaves the throwers hand.

a) What is its speed after falling for 2.00s?
b) How far does it fall in 2.00s?
c) What is the magnitude of its velocity after falling 10.0m?