The Soil and the soil properties are the same as in Question $3$; in this soil, the ground water table is at the surface, excavation is made up to the level of $5$ meters depth, and a concrete wall of $7\mathrm{.}5m$ is constructed to return the soil behind. Assume the thickness of the wall is $1m$ and rectangular in cross$-$section; check if this wall satisfies the following criteria:

a$.$ Overturning with respect to point Points