$3.$ For the subsurface conditions shown below, the sand and gravel layer underlying the clay stratum is a pressurized aquifer and the water level in a piezometer rises $7\mathrm{.}5$ feet above the lake level as shown.

Calculate the total and effective stresses at Points A and B$.$ Assume that the coefficient of the permeability of the sand and gravel layer is several orders of magnitude greater than the clay layer.

$[$Point A $-4,416$ psf$,1182$ psf; Point B $-1,186$ psf$,94$ psf $]$