The body in the figure is pivoted at O. Three forces act on it in the directions shown: FA = 8.60 N at point A, 7.90 m from O; FB = 17.0 N at point B, 4.80 m from O; and FC = 19.0 N at point C, 4.40 m from O. Taking the clockwise direction to be negative, what is the net torque about O? Number Units