Consider the following figure.

$($a$)$ Determine the maximum tensile stress ${}_t$ and maximum compressive stress ${}_c($in MPa$)$ due to the load $P$ acting on the simple beam $AB.$ Data are $P=6\mathrm{.}3kN,L=3\mathrm{.}5m,d=1\mathrm{.}28m,b=80mm,$

$t=25mm,h=120mm,$ and $h_1=90mm.($Use the deformation sign convention.$)$

${}_t=,$MPa

${}_c=1,$MPa

$($b$)$ Find the value of $d($in m $)$ for which tensile and compressive stresses are the largest. What are these stresses $($in MPa$)?($Use the deformation sign convention.$)$

$d=1|m$

${}_t=$MPa

${}_c=|MPa$