What is the answer to the following question ?

A plane, diving with constant speed at an angle of 43.9% with the vertical, releases a projectile at an altitude of 700 m. The projectile hits the ground 6.28s after release. (:) What is the speed of the plane? (b) How far does the projectile travel horizontally during its flight? What were the magnitudes of the (c] horizontal and (d) vertical components of its velocity just before striking the ground? State your answers to [c) and [d) as positive numbers.)