Please explain your answer A 0.26 Kg is thrown vertically upward from the top of a cliff that is 32 m high.

Please explain your answer

A 0.26 Kg is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff, the rock has a speed of 33 m/s

Find the greatest height of the rock as measured from the base of the cliff.