A 2.0kg projectile is fired with initial velocity components Vox=30m/s and Voy=40m/s from a point on the earth?

a 2.0kg projectile is fired with initial velocity components Vox=30m/s and Voy=40m/s from a point on the earths surface. neglect any effects due to air resistance. (A) how much work was done in firing the projectile? (B) what is the kinetic energy of the projectile when it reaches the highest point in its trajectory? (C) what is the gravitational potential energy at the highest point?