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Required information

Deformable rods BD and CF are attached to a rigid rod ABC as shown.

Rod $BD$ is made of steel $(E_{st}=200$GPa $)$ and has an uniform $223\mathrm{.}9m{m}^2$ cross section.

Rod CF is made of aluminum $(E_{al}=70$GPa $)$ and has an uniform $303\mathrm{.}9m{m}^2$ cross section.

If a load $P=10kN$ were applied at $A,$ determine the deflection at $A.$

$2$ F members in the frame are