Calculate the forces in member CF of the truss and state the member is in tension or compression. Using the method of sections. до a E A) F19801b (C) B) F1580lb (T) CF C) For=1980lb (T) D) F CF = 15801b (C) B C D a 4 ft 4 ft 4 ft: 600 lb 600 lb 800 lb 4 ft