Calculate the effective stresses at points A and $B.[5$ marks$]$

Redraw the sketch below in your answer sheet and develop the relationship based on the elastic theory $($influence factor method$)$ for the calculation of the stress under the uniformly loaded foundation at point A$.[5$ marks$]$

A normally consolidated saturated clay layer with a thickness of $8$ m is underlain by bedrock. If a $2$ m high embankment with a unit weight of $20k\frac{N}{m^3}$ is placed on the top of the clay layer, what would be its final settlement? Take $e_0=0\mathrm{.}8.[10$ marks$]$

A $4-$m$-$thick layer $($single drainage$)$ of saturated clay under a surcharge loading underwent $90\%$ primary consolidation in $63$ days. Find the coefficient of consolidation of clay for the pressure range $(T_{90}=0\mathrm{.}848).[6$ marks$]$

Find the equivalent horizont force acting on the retainir wall. $[8$ marks$]$