I need help on a sum in physics on projectile motion , please help!?

A gun is kept on a straight horizontal road is used to hit a car traveling along along the same road away from the gun with a uniform speed of 72 Km/hr. The car is at a distance of 500 m from the gun when the gun is fired at an angle of 45� to the horizontal . Find (i) the distance of the car from the gun when the shell hits it and, (ii) the speed of projection of the shell from the gun.