A $1\mathrm{.}375-$in$.-$diameter solid steel shaft supports loads $P_A=360lb,P_C=640lb,$ and $P_E=360lb,$ as shown. Assume that $L_{AB}=11in.,L_{BC}=$

$26in.,L_{CD}=13$ in$.,$ and $L_{DE}=17$ in$.$ The bearing at $B$ can be idealized as a roller support, and the bearing at $D$ can be idealized as a pin

support. Determine the magnitude of the maximum bending stress in the shaft.

Answer: ${}_{\text{m}\text{a}\text{x}}=$

ksi