A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 463 N and have a center of gravity that is 1.29 m above the floor. His upper legs weigh 178 N and have a center of gravity that is 0.721 m above the floor. Finally, his lower legs and feet together weigh 83.9 N and have a center of gravity that is 0.291 m above the floor. Relative to the floor, find the location of the center of gravity for the entire body.