Force on wheels

Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle. The distance from the rear wheels to the center of gravity is $0.63 \text{ m.}$ The distance from the front wheels to the center of gravity is $2.30 \text{ m.}$ The mass of the truck and its contents is $7765 \text{ kg.}$ Find the magnitudes of the forces exerted by the ground on the rear wheels.

Gravitational acceleration is $g = 9.8 \text{ m/s}^2 .$