P $=28$ klf Given: A $12"$ concrete wall carrying a $28$ klf factored load is supported by a $7\text{'}-0"$ wide concrete strip footing that is $1\text{'}-6"$ thick. The base of the footing is $4\text{'}-6"$ below grade. $3\text{'}-0"1\text{'}-6"$ The following material properties apply: $$ fo $=3000$ psi fy $=60,000$ psi $7\text{'}-0"$ Assume an effective depth $($d$)4"$ less than the thickness of the footing. Find: $1.$ Determine net factored soil pressure $($anu$)2.$ Check the footing for one$-$way shear $3.$ Determine the required area of steel $($As$)$ in units of $[$in