$($a$)-($h$)$ Determine the maxiumum normal stress ${}_x$ in the beams shown here, using the

values $($as needed$)L=2m,a=0\mathrm{.}5mw=12K\frac{N}{m},P=25KN.$ Assume a rectangular

cross$-$section of width $b=20cm$ and height $h=30cm.$

$($g$)$

$($h$)$