For the plain strain element shown in Figure 1 determine the following: a. the element stresses Ox, Oy, Txy, 01, 02 b. Determine the principal angle Op v2 = 0.0025 cm v3 = 0.0 cm u = 0.001 cm u = 0.001 cm V = 0.005 cm u3 = 0.0 cm V3 (2.5) [30] [5] m A = (2) (4) = 4 cm = (2,1) (4,1) Figure 2 Let E 210 GPa and v = 0.25, and use unit thickness for plane strain. i = node 1,j = node 2 and m = node 3