A soil sample was removed from a clayey layer below ground where a high rise apartment block is to be built. A consolidation settlement test was conducted in an Oedometer cell in the laboratory $($results below$).$ The clay layer extends from $8\mathrm{.}6$ m to $12\mathrm{.}9$ m and above the clay layer, only sandy gravel is encountered. A water table was logged at $6\mathrm{.}3$ m below ground level. Above the water table the sandy gravel has a dry density of $1925k\frac{g}{m^3}$ and below the water table a saturated density of $2010k\frac{g}{m^3}.$ The clay's saturated density is $1745k\frac{g}{m^3}.$ The foundations for the building will extend to $6$ m below ground and exert a line load of $1350k\frac{N}{m^2}.$

Note: The initial thickness of the specimen was $26$ mm $,$ and at the end of the test, the moisture content was $28\mathrm{.}95\%.$ Assume $Gs=2\mathrm{.}7\frac{g}{c}{m}^3,g=9\mathrm{.}81\frac{m}{s^2}$ and $Sr=1.$

$\backslash$table$[[\backslash$table$[[$Pressure$,],[$kPa$]],0,30,60,120,240,480,960,1920,0],[\backslash$table$[[$Dial gauge,$],[$mm$]],\backslash$table$[[6],[$start$]],5,12,4,86,4,63,4,38,4,13,3,90,3,65,\backslash$table$[[4,16],[$end$]]]]$

You are required to do the following:

$4\mathrm{.}1.$ Determine the expected pressures at the founding levels before and after construction. Show all calculations and use the standard unit format of kPa $.$

$4\mathrm{.}2.$ Determine the void ratios at each loading increment and present these values in the table provided below.

$4\mathrm{.}3.$ Establish a graph on the graph paper provided and plot the compression curve.

$4\mathrm{.}4.$ Indicate clearly the final void ratios, before and after construction. Note: Choose an appropriate scale to three decimal places.

$4\mathrm{.}5.$ Calculate the clay's predicted consolidation settlement due to the erection of the building and increase in stress. Round up the final answer to the nearest mm$.$

$4\mathrm{.}6.$ Determine from data available from the NHBRC $($National Home Builders Registration Council$)$ how this site may classified, with reference to the differential settlement being assumed to be $50\%.$