For the component described in the problem indicated, determine

(a) The principal mass moments of inertia at the origin,

(b) The principal axes of inertia at the origin. Sketch the body and show the orientation of the principal axes of inertia relative to the x, y, and z axes. Prob. 9.169: The thin bent plate shown is of uniform density and weight W. Determine its mass moment of inertia with respect to the line joining the origin O and point A.