A solar panel is supported by a fixed structure ABCD. The screw-driven actuator AE cause...

A solar panel is supported by a fixed structure ABCD. The screw-driven actuator AE causes the solar panel to rotate on portion CD of the structure so that the panel tracks the motion of the sun during the day. If the actuator applies a 12 lb force to point E, where the z component of this force is positive, determine the moment of this force about line a.