Can someone please answer these 3 questions for me ?? Please Quick ?

Need urgent help for these questions please, can someone solve.

Will someone please explain how to figure these questionsout?

1. A football is kicked straight up into the air; it hits theground 5.4 s later.

a) What was the greatest height reached by the ball? Assume it iskicked from ground level. Ymax=?

b) With what speed did it leave the kicker's foot? Vy=?

Can someone please solve this problem.