Consider the soil profile shown in Fig. $2.$

A wide fill, $7$ feet thick and density equal to $120pcf$ is ptaced over the surface of the sand layer.

a$.$ Compute the settlement resulting from the primary consolidation of the clay layer $($do not subdivide$).$

b$.$ Compute the total settlement resulting from the consolidation of the clay layer after $35$ years.

c$.$ Compute the time in days required for $95\%$ primary consolidation of the clay layer. $T_{95}=1\mathrm{.}13.$

d$.$ Sketch the excess pore water pressure isochron corresponding to the average degree of consolidation of $70\%$ and compute $($approximate using the sketch$)$ pore water pressure $($not excess pore water pressure$)$ at mid$-$depth of the clay layer.