8.(SI Units) The following flow curve parameters were obtained for a metal alloy in a tensile test:strength coefficient = 550 MPa and strain-hardening exponent = 0.25. The same metal is

now tested in a compression test in which the starting height of the specimen = 50 mm and its diameter = 30 mm. Assuming that the cross section increases uniformly, determine the load required to compress the specimen to a height of (a) 45 mm and (b) 35 mm. (3')