The truck has a weight of 8000 lb and center of gravity at Gt. It carries the 800-lb crate...

The truck has a weight of 8000 lb and center of gravity at Gt. It carries the 800-lb crate, which has a center of gravity at Gc. Determine the normal reaction at each of its four tires if it accelerates at a = 0.5 ft/s2. Also, what is the frictional force acting between the crate and the truck, and between each of the rear tires and the road? Assume that power is delivered only to the rear tires. The front tires are free to roll. Neglect the mass of the tires. The crate does not slip or tip on the truck.