Using the slope$-$deflection method, determine the moments at $\backslash ($ A$,$ B$,$ C $\backslash )$ and $\backslash ($ D $\backslash )$ of the beam shown in Figure $1,$ then draw the moment diagram for the beam. Assume the support at $\backslash ($ A $\backslash )$ and $\backslash ($ D $\backslash )$ are fixed and $\backslash ($ B $\backslash )$ and $\backslash ($ C $\backslash )$ are rollers. $\backslash ($ E l $\backslash )$ is constant.

Figure $1$