A $2ft.$ deep compacted fill $($unit

weight $=115lb\frac{.}{f}t3)$ is to be

placed over a clay layer with a

thickness of $5$

ft$.($Saturated unit weight $=117\mathrm{.}0$

lb$./$ft $3).$ A consolidation test on

a sample the clay layer

produced the following results:

$Cc=0\mathrm{.}12,eO=0\mathrm{.}5.$ Calculate the

consolidation settlement for the

clay layer assuming that the

groundwater table level is at the

surface:

a$.3\mathrm{.}2$ in

b$.1\mathrm{.}5$ in

c$.2\mathrm{.}5$ in

d$.2\mathrm{.}1$ in