PROBLEM $2\mathrm{.}39$

Two cylindrical rods, $AC$ made of aluminum and $CD$ made of steel, are

joined at $C$ and restrained by rigid supports at A and $D.$ For the loading

shown and knowing that $E_a=10\mathrm{.}4{10}^6$ psi and $E_{}=29{10}^6$ psi,

determine $($a$)$ the reactions at A and $D,(b)$ the deflection of point $C.$