$2($a$)$ Explain the types of shallow foundations and modes of shear failure with sketches

$(5)$

$($b$)$ A square footing placed at a depth of $1m$ below the ground level is to carry a load $1000KN.$ The properties of soil are $C=10K\frac{N}{m^2},=38,$ and $=20K\frac{W}{m^3}.$ If the Water table appears to be at a greater depth proportion the size of the footing.

What will be size of the fooring if the WT rises to the level of footing for $=38,Nc=61\mathrm{.}35Nq=48\mathrm{.}93,Nr=74$

OR