A uniform compressive stress σz is applied to the surface of the metal alloy, and it may be assumed that there is no friction between the alloy and the die. This aluminum alloy has Young’s modulus E=70GPa and a Poisson’s ratio ν=0.33. Determine the value of σz, in MPa, necessary to cause yielding when σyield=400MPa for each of the yield criteria in Rankine, Tresca and Von Mises.