A modified Proctor compaction test was carried out on a clayey sand in a cylin$-$

drical mold that has a volume of $944c{m}^3.$ The specific gravity of the soil grains

is $2\mathrm{.}61.$ The moisture content and the mass of the six compacted specimens are

given below.

a$.$ Using the compaction test data determine the optimum moisture con$-$

tent and the maximum dry unit weight.

b$.$ Plot the zero air void curve and check whether it intersects the compac$-$

tion curve.

c$.$ Plot the void ratio and the degree of saturation against the moisture content.

d$.$ What are the void ratio and degree of saturation at the optimum mois$-$

ture content?