d$)$ Calculate the additional stress $({}_v)$ caused by an axial load $(20$kip$\frac{s}{f}t)$ at $9$ feet beneath the center of the footing using the elastic solution.

e$)$ Calculate the consolidation settlement of the clay layer induced by $({}_v)$ of the footing under an axial load $P=20$Kip$\frac{s}{f}t.$

$N=10$ blows$/$ft

Clay

Void ratio $(e_0)=0\mathrm{.}8$

$20$ft

Rock

$2$