The composite shaft, consisting of aluminum, copper, and steel sections, is subjected to the loading shown. Determine the displacement of B with respect to C. The cross-sectional area and modulus of elasticity for each section are shown in the figure. Neglect the size of the collars at B and C.

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Aluminum E = 10(10) ksi AAB = 0.09 in? Copper E = 18(10') ksi Agc = 0.12 in? Steel E = 29(10") ksi Acp = 0.06 in? BC 3.50 kip 1.75 kip 1.50 kip 2.00 kip BL 1.75 kip 3.50 kip -18 in.- -12 in- -16 in-