For problems $4$ and $5$: Soil properties: $=125psf,c=1\mathrm{.}52ksf,{}^{\text{'}}=0$

$4.$ You are asked to build a $40-$ft high levee out of clay. The embankment is placed on soil with the same properties. Based on the soil properties, and a design slope of $1$:$4(H$:$V),$ is the slope safe $)>(1?$ Do you expect the failure circle to pass through the face, toe, or base of the embankment?