The cantilever truss in Figure P3.13 was constructed by a builder to support a winch and cable system (not shown) to lift and lower construction materials. The truss members are nominal 2 x 4 southern yellow pine (actual dimensions 1.75 in. x 3.5 in.; E = 2 x 100 psi). Using the direct stiffness method, calculate a. The global displacement components of all unconstrained nodes. b. Axial stress in each member. c. Reaction forces at constrained nodes. d. Check the equilibrium conditions. 30° 30° 500 lb Node X Y 1 0 0 2 096 45° 3 96 96 4 96 151.4 5 192 96 (inches) Figure P3.13