Consider a part made from aluminum: Sut = 480 MPa, Sy = 480 MPa, Sy = 410 MPa, S5*108 = 120 MPa, (all factors included). The material is subjected to a 10 s cycle where loads are applied as shown below: (MPa) 340 210 160 120 0 -40 -60 10 t(s) a) Find the em, ea and the number of cycles (n) for each specific overstress level (Remember the basic definition of and m, in this scenario m = em and a = ea) b) Construct the modified goodman diagram for this material and find the lines of constant life for each load point, noting the stress level where ea for each line intersects the axis (corresponding to m = 0). c) Find the number of cycles to failure for each of the lines of constant life (from part b). Use the log Slog N plot. d) Estimate the lifetime given the 10 s cycle.