For the truss structure shown right, determine the number of zero- force members. (a) 4 (b) 3 (c) 2 (d) None of the above 900 N 2 m E C 2 m B The figure shows a simple truss structure. Determine the force in members AB and BC and state if the members are in tension (T) or compression (C). (a) FAB 625 lb (T), = (b) FAB 625 lb (C), FBC = 375 lb (T) FBC = 375 lb (T) FBC = 667 lb (T) 4 ft (c) FAB 833 lb (C), (d) None of the above -3 ft- 500 lb B