$4\mathrm{.}2$ The fixed$-$fixed bar shown in Figure P$4\mathrm{.}2$ has axial forces applied at $\frac{L}{3}$ and $2L/3.$ Use the finite element method to compute the axial deflections and support reactions$\mathrm{.}4\mathrm{.}2$ The fixed$-$fixed bar shown in Figure P$4\mathrm{.}2$ has axial forces applied at $\frac{L}{3}$ and $2L/3.$ Use the finite element method to compute the axial deflections and support reactions.