A 40-horsepower electric motor, rotating at 1150 revolutions per minute (rpm), drives a conveyor through a gearbox containing a pair of 20-degree involute, straight steel spur gears. The gearbox consists of a 20-tooth pinion (input) and a 48-tooth gear. Both gears have a face width of 2.25 inches, and the diametral pitch is 6. We assume a gear quality of A11, and the gears are enclosed in a commercially enclosed gear housing. The power source is uniform, but the conveyor loading results in moderate shock, indicated by an overload factor (KO) of 1.25. Determine the Bending Stress for the pinion and gear.