$4\mathrm{.}5-19$ Consider the two beams shown in the figures. Which beam has the larger maximum moment?

First, find support reactions; then plot axial force $(N),$ shear $(V),$ and moment $(M)$ diagrams for both beams. Label all critical $N,V,$ and $M$ values and also the distance to points where $N,V,$ and$/$or $M$ are zero.

$($a$)$

$($b$)$