Question #$2$: $(5).$ Determine the allowable bearing pressure for a circular footing, $5m$ in diameter, situated in sand at a depth of $2m.$ The sand has an internal angle of friction of $34,$ an apparent cohesion of $5$kPa, a total unit weight above the water table of $18\mathrm{.}75k\frac{N}{m^3}$ and a saturated unit weight of $20\mathrm{.}4k\frac{N}{m^3}.$ The groundwater table is assumed to be $2m$ below surface. Use a factor of safety of $3.$

$\backslash$table$[[$Depth to GW$,$ z$,$ from surface,Unit weight for $N,$Surcharge term, qs$],[z=0,$sub$,$subD$],[z=D,$ysub,pbulkD$],[{}_{\text{s}\text{u}\text{b}}+(\frac{z-D}{B}{)}^{**}({}_{\text{b}\text{u}\text{l}\text{k}}-{}_{\text{s}\text{u}\text{b}})z>D+BD,{}_{\text{s}\text{u}\text{b}}+(\frac{z-D}{B}{)}^{**}({}_{\text{b}\text{u}\text{l}\text{k}}-{}_{\text{s}\text{u}\text{b}}),$pbulkD