PROBLEM $1($follow the instructions$)$

Use the Method of Sections. The beam shown is supported by a pin and a roller at A and $B,$ respectively. The horizontal distance from $C$ to $D$ is $1\mathrm{.}5ft.$ Draw the simplified free body diagram and the shear and bending moments diagrams. Let the analysis be from left to right. Determine the points of zero shear $($if any$),$ their distance from point a$,$ and the bending moments at these points. Indicate the value of all the points, degree of all curves, and the maximum shear and maximum bending moment of the beam.