A compacted fill is to be placed over the soil profile shown. The height and unit weight of the fill are $2m$ and $18\mathrm{.}5k\frac{N}{m^3}$ respectively. The fine$-$coarse sand layer has $Y_{\text{d}\text{r}\text{y}}=16\mathrm{.}5k\frac{N}{m^3},Y_{\text{s}\text{a}\text{t}}=17\mathrm{.}5k\frac{N}{m^3},$ relative density $(D_r)=80\%$ whereas $H_1=4m$ and $H_2=3m.$ The clay layer has $Y_{\text{d}\text{r}\text{y}}=17k\frac{N}{m^3},Y_{\text{s}\text{a}\text{t}}=18k\frac{N}{m^3}$ whereas $H_3=5m,$ compression index $(C_c)=0\mathrm{.}6,$ swell index $(C_r)=0\mathrm{.}09,$ initial void ratio $(e_0)=0\mathrm{.}7$ and preconsolidation pressure $({}_c^{\text{'}})=140$kPa. Take the clay layer as one single layer and calculate the total consolidation settlement.

If point $A$ is $4m$ below the upper boundary of the clay layer, calculate the excess, hydrostatic and total pore water pressures at point A$,4500$ days after the placement of the compacted fill as the consolidation coefficient $(C_v)$ is $0\mathrm{.}086\frac{m^2}{?}$ day and there is also another sand layer beneath the clay layer.

$(4$pts$)$