Consider the soil profile shown in Fig. $2.$ A $10-$foot square footing is placed $3$ feet below

ground surface. Assume a net uniform contact pressure of $2000psf.$ Determine depth D$,$ as well

as the effective stress at the midpoint of the desiccated crust layer and the clay layer $($D must be

determined before you can calculate effective stress at the midpoint of the clay layer$).$ Calculate

the applied stress both at the centerline of the footing as well as the edge of the footing. You

should have $2$ effective stresses and $4$ applied stresses in total.