Consider two wide flange shapes, W8x35 and W18x35, with Fy= = 60 ksi subjected to major-axis bending. (a) Classify the cross sections with respect to local buckling. (b) Calculate L, and L, for both shapes. (c) Using Excel or other computer software, create a plot with design moment strength, Mn, versus unbraced length, L, curves for the following cases (all curves on the same plot). (i) W8x35 with C = 1.0 (ii) W18x35 with C = 1.0 (iii) W18x35 with Cb = 1.32 (iv) W18x35 with C = 1.0 and F = 36 ksi (d) Create a table showing the design moment strength, Mn, at Lb = Lp, Lb = L,, and L = 40'-0" for each of the cases above (e) Make brief comments on the your results, in particular: (i) From a strength perspective, under what conditions would be advantageous to use either of these wide flange shapes of equal weight as a beam? (ii) How does the yield stress effect the design moment strength over the range of unbraced lengths?