AP Physics Projectile motion?

Question

Im currently on a WebAssign for my AP Physics Class and this problem has been a real pain. Here's the scenario:

A projectile is shot from the edge of a cliff h = 285 m above ground level with an initial speed of v₀ = 155 m/s at an angle of 37.0° with the horizontal, as shown in the figure below.

(a) Determine the time taken by the projectile to hit point P at ground level. 

(Finished already)

(b) Determine the range X of the projectile as measured from the base of the cliff. 

 (Incorrect Despite having found A, used time x v0x )

(c) At the instant just before the projectile hits point P, find the horizontal and the vertical components of its velocity. (Take up and to the right as positive directions.)

(X known)

(e) What is the angle made by the velocity vector with the horizontal? 

 (below the horizontal) 

(f) Find the maximum height above the cliff top reached by the projectile. 

Answer 1