Ashaft is loaded in bending and torsion such that ma = 70 n. m, ta=45 n. m, mm=55 n. m, and tm = 35 n. m. for the shaft, su = 700 mpa and sy=560 mpa, and a fully corrected endurance limit of se=210 mpa is assumed. let kf=2.2 and kfs=1.8. with a design factor of 2.0 determine the minimum acceptable diameter of the shaft using the (a) de-gerber criterion. (b) de-asme elliptic criterion. (c) de-soderberg criterion. (d) de-goodman criterion. discuss and compare the results.