A football is kicked vertically upward from the ground and a student gazing out of the window sees it moving...

A football is kicked vertically upward from the ground and a student gazing out of the window sees it moving upward past her at 5.00 m/s. The window is 10.0 m above the ground.

a. how high does the ball go above the ground?

b. how long does it take to go from a height of 10m to its highest point?

c. find its velocity and acceleration 1/2s after it left the ground.