(3 a) Since truss members cannot support moment, supports and inter-member connections are usually represented by ball-and-socket joints for 3D trusses and hinges for 2D trusses. Group of answer...

Suppose you're using the method of sections to perform a 3D truss analysis.  In order to solve for the forces in all the "cut" members with unknown forces, your "cut" may pass through no more than ______ members for which forces are unknown.