For each problem below, construct the shear and moment diagrams and determine the magnitude and location of the maximum shear force and maximum bending moment. $19\mathrm{.}1$

$($Ans$.V_{\text{m}\text{a}\text{x}}=780lb$ at $0\mathrm{.}0ftx4\mathrm{.}0ft,M_{\text{m}\text{a}\text{x}}=4,240lb-ft$ at $x=8\mathrm{.}0ft)$