Two cylindrical rods, AC made of aluminum and CD made of steel, are joined at C and restrained by rigid supports at A and D. It is given that $E_a = 10.4 \times 10^6$ psi, $E_s = 29 \times 10^6$ psi, and P = 34 kips. Determine the reactions at A and D. Answer: reaction at A = 21.46 kips to the left.