P$8\mathrm{.}26$ A small aluminum alloy $[$E $=70$ GPa$]$ tee shape is used as a simply supported beam as shown in Figure P$8\mathrm{.}26$a$.$ For this beam, a $=160$ mm$.$ The cross$$sectional dimensions $($Figure P$8\mathrm{.}26$b$)$ of the tee shape are b $=20$ mm$,$ d $=30$ mm$,$ and t $=6$ mm$.$ After loads are applied to the beam at B$,$ C$,$ and D$,$ a compressive normal strain of $440\backslash$mu $$ is measured from a strain gage located at c $=8$ mm below the topmost edge of the tee stem at section $11.$ What is the applied load P$?$