A granular soil $($sand$)$ was tested in the laboratory and was found to have maximum and minimum void ratios of $0\mathrm{.}84$ and $0\mathrm{.}38,$ respectively. The value of specific gravity $($Gs$)$ was $2\mathrm{.}65.$ A natural deposit of the same sand has $9\%$ moisture; its moisture unit weight is $18\mathrm{.}64$ kN$/$m$^3.$ Determine the relative density of the soil in the field. Derive all necessary relationships.