c$)$ From the retaining wall shown in Fig $2$ below, if the soil over consolidation ratio$-$OCR$=1.$

Fig $2$

Determine.

i$.$ The total lateral earth force at rest per unit length of the wall.

$(8$ Marks$)$

ii$.$ The location of resultant force.

$(4$ Marks$)$

d$)$ Draw the pressure diagram of the problem in $($c$)$ above.

$(3$ Marks$)$