Consider the following plane stress linear triangle finite element. 3.1 Given the nodal displacements, what are the component stresses and strains in the element? points) 3.2 Calculate the stiffness matrix [k] given the geometry and properties below. (10 points) Y (1., 1.) m (4., 5.) j Coordinate system is based in inches. E = 15.5 E+6 psi v = 0.31 t = 0.15 inches (6., 3.) u = -0.002 V = -0.001 uj = 0. X Vj = 0.005 Um = -0.002 Vm = 0.010