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A building was to be constructed on a clay stratum. Preliminary analysis indicated a settlement of $250$ mm$.$ The average increase of pressure in the clay stratum was $24$ kN$/$m$^2.$ Analysis also indicated

settlement of $50$ mm in $6$ years. The following variations occurred from the assumptions used in the preliminary analysis.

$($i$)$ The loading period was $3$ years, which was not considered in the preliminary analysis. $($ii$)$ Borings indicated $20\%$ more thickness for the clay stratum than originally assumed.

$($iii$)$ During construction the W$.$T$.$ got lowered permanently by $1$ metre.

Estimate:

$1.$ The ultimate settlement.

$2.$ The settlement at the end of the loading period. $3.$ The settlement $2$ years after completion of building.