1. Four small 0.500-kg spheres, each of which you can regard as a point mass, are arranged in a square 4m on a side and connected by light rods. (See the figure below.) 1m C B 3m D A a) Find the moment of inertia of the system about an axis along the line AB. b) Find the moment of inertia of the system about an axis along the line CD. c) Find the moment of inertia of the system about an axis through the center of the square, perpendicular to its plane at point O.