Q$2$: A$2024-$T$851$ aluminum alloy $(Sy=444$MPa $)$ frame supports a concentrated load as shown in Fig. $2.$ Determine the magnitude of permissible value of $p$ using the following criteria: a$)$ maximum shear stress and b$)$ maximum distortion energy. Given a factor of safety $n=1\mathrm{.}5$ and dimensions are $w=50mm,d=125mm$ and $t=25mm.$

${}_1^2={}_2^2-{}_1^2{}_{-y}^2=(\frac{Sy}{n})$