Consider a part with the following properties: sut-80 ksi, sy 60 ksi, se 25 ksi (fully corrected this includes all marin factors, whose product is 0.625), and f= 0.9. the expected loads for this part are an alternating von mises stress, σ., of 30 ksi, and a mean von mises stress, c' of 20 ksi. proportional overload is expected. a) draw the modified goodman failure envelope for this part below, labeling the failure lines and the load point. 80t 70 2 60 20 10 0 10 20 30 40 50 60 70 80 mean stress (ksi) b) the part will have finite infinite life because the load point is inside / outside the failure envelope. c) the equivalent alternating stress, si, which can be used to estimate the fatigue life is: (find both graphically and numerically - show all work.) d) calculate the constants a and b for the high cycle fatigue equation, s an