F$-2$ A sample of soil has a density of $1850k\frac{g}{m^3}$ in its natural stact and $1700k\frac{g}{m^3}$ after oven drying. The specific gravity of the soil particles was $2\mathrm{.}65.$

Determine: $($a$)$ The water content of the soil

$($b$)$ The void ratio

$($c$)$ The porosity