$3-$ The below grid represents a pit excavation with $20$ feet$-$by$-20-$feet squares. The below table shows the existing and proposed levels at each point. The soil has a shrinkage factor of $0\mathrm{.}9$ and a load factor of $0\mathrm{.}75.$ Answer the below quest

$\backslash$table$[[$Point$,\backslash$table$[[$Proposed$],[$level $($ft$)]],\backslash$table$[[$Existing$],[$level $($ft$)]]],[$A$,4,3\mathrm{.}5],[$B$,5,4\mathrm{.}5],[$C$,6,7\mathrm{.}5],[$D$,8,6],[$E$,5,3],[$F$,8,3]]$

a$)$ Estimate the volume of earthwork needed.

b$)$ Is your answer in part a cut or fill?

c$)$ Estimate the compacted volume of this soil.