$($Foundation plan view on the left and wall section on the right$).$ Working distance is $1\mathrm{.}5\text{'}.$ Slope of excavation is $2$:$1($vertical:horizontal$).$ The soil has swell of $10\%$ and shrinkage of $85\%.$

Determine the amount of general excavation $($continuous footing excavation$).$ Show your work and unit of measure $($bcy$,$ lcy$,$ or ccy$)$ in your answer.

Determine the amount of backfill. Show your work and unit of measure in your answer.

How much soil will be left in loose cubic yards $($lcy$)$ after backfilling? Show your work and unit of measure in your answer.