Find the center of gravity for the three-axle truck shown. The front axle supports a mass of 3.5 Mg, the middle axle supports a mass of 12.0 Mg, and the rear axle supports a mass of 14.0 Mg. The middle axle is 4.5 m from the front axle and 10 m from the rear axle. Locate the center of gravity with respect to the front axle.