PHYSICS PROJECTILE HELP?

A cannonball is shot out of a cannon with an initial velocity of 225 km/h at and angle of 30 degrees with a horizontal. The cannonball lands on an enemy ship at the same height from which it launched. There is no wind and we are going to ignore air resistance. Vertically, ume that upward motion is positive and downward motion is negative. Horizontally, ume that the motion away from the cannon is positive.