. A crate rests on the horizontal bed of a pickup truck. For each situation described below, indicate the motion of the crate relative to the ground, the motion of the crate relative to the truck, and whether the crate will hit the front wall of the truck bed, the back wall, or neither. Disregard friction. a. Starting at rest, the truck accelerates to the right. _________________________________________________________________ b. The crate is at rest relative to the truck while the truck moves to the right with a constant velocity. _________________________________________________________________ c. The truck in item b slows down