$1).$ Classify and describe the soil stratum in Figure $13($attached$)$ between the depths of $40$ and

$47$ feet and between $66$ and $80$ feet. Assume that the ground water table is at the surface and

that all the soils have a saturated unit weight of $120$ pcf$.$ Indicate the significance of the spike

in the plots at a depth of $77$ feet. Assume standard cone tip and that qc $=$ qtical purposes, $1tsf=1k\frac{g}{c}{m}^2($Alta Geo Cone Penetrometer Testing Services, Sandy, Utah$).$