A cantilever beam of W 12 x 14 section and length L x 9 ft supports a slightly inclined load P x 500 lb at the free end (see figure).
(a) Plot a graph of the stress σA at point A as a function of the angle of inclination a.
(b) Plot a graph of the angle b, which locates the neutral axis nn, as a function of the angle a. (When plotting the graphs, let α vary from 0 to 10°.)

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B.