Three compaction energy levels $($Modified$,$ standard and low energy levels$)$ were performed on three identical soil samples $)=(2\mathrm{.}64.$ The data is shown in the table below.

$($a$)$ Plot the three compaction curves in one graph and obtain the maximum dry density and optimum water content for each curve.

$($b$)$ Plot the line of optimums

$($c$)$ Plot the ZAV curve.

$($d$)$ Plot the $70,80$ and $90\%$ saturation curves.

$($e$)$ Compute the degree of saturation at the maximum dry density for each curve.

$($f$)$ Write short comments on your results in $($a$)$ to $($e$).$

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