Problem 6. The truss below was designed to hang a one-of-a-kind sign that weighs 1000 lb. The sign is attached to the truss by two cables at attached at pin H of the truss and a rod that is attached at pin G of the truss; the rod is pin connected at both ends. The truss is attached to the wall by a pin at A and another cable (there are 3 cables at point H). Find the internal force in members AE, CH, EC, and EF. Sign: 6'): 8', 1000 lb