2. The plate shown in the figure is made of steel with E-210 GPa and v=0.33. Assume plane stress (1 = T, = G, = 0). a) If o=100 MPa, determine the magnitude of o,, such that the width b=400 mm does not change. 6 points 12 points b) Determine the change in length of the diagonals of the rectangle. c) Assuming the thickness to be 10 mm, calculate the change in the thickness of the member. 7 points b- 400 mm a 600mm A