Given t$=1$in$,$ d$=0\mathrm{.}40$in$,$ h$=1\mathrm{.}3$in$,$ w$=1\mathrm{.}5$in$,$ r$=0\mathrm{.}15$in$,$ and the allowable normal stress for the bar is $25$ksi. $(1)$ determine the maximum axial force P that can be applied to the bar. $(2)$ determine the maximum axial force P that can be applied to the bar if the hole did not exist.