$12\mathrm{.}1$ Bending Shear$/$Moment $-$ Method of Sections

Express the internal shear and moment in terms of $\backslash ($ x $\backslash )$ and then draw the shear and moment diagrams. You must use the "BRUTE FORCE" $($method of sections$)$ way, drawing your section FBDs for each region, and coming up with an exact formula for $\backslash ($ V$($x$)\backslash )$ and $\backslash ($ M$($x$)\backslash )$ in each region.