(a) in Figure P3.31 trusses 1 and 2 are stable elements that can be treated as rigid bodie...

(a) in Figure P3.31 trusses 1 and 2 are stable elements that can be treated as rigid bodies. Compute all reactions. (b) Draw free-body diagrams of each truss and evaluvate the forces applied to the trusses at joints C, B, and D.