A step bar with a hole has widths $b=4\mathrm{.}5$ in and $c=3$ in$.$ The fillets have radii equal to $0\mathrm{.}45$ in and the hole

diameter is $0\mathrm{.}54$ in $.$ The bar is subjected to a load $P=30$kips. Determine the minimum required thickness of

the bar including a factor of safety of $1\mathrm{.}5$ if the allowable stress in the bar is $36$ ksi

Please show work