Most important pls answer D$...$ thank you!

A Standard Proctor test yields the values listed below for a soil with $Gs=2\mathrm{.}71.$

a$.)$ Plot the compaction curve and the zero$-$air voids line. You may use Excel to plot the compaction curve and the zero$-$air voids line, but the complete calculations and formula used must be prested in

the solutions.

b$.)$ Determine the maximum dry unit weight $(lb\frac{s}{f}{t}^3)$ and the optimum moisture content

c$.)$ Determine the dry unit weight and the moisture content range at $90\%$ relative compaction.

d$.)$ Determine the volume of water $($in gallons$)$ to be added to obtain a $1$ cubic yard of soil at maximum dry unit weight, if the soil was originally at $10\%$ water content