A soil sample obtained from field weights $10\mathrm{.}0$ lbs and has a volume of $0\mathrm{.}1$ ft$3$

$.$ After oven dry

the weight of this soil sample became $8\mathrm{.}5$ lbs$.$ If the soil has specific gravity of solids Gs$=2\mathrm{.}60,$

$($a$)$ what is the moisture content of this soil sample

$($b$)$ what is the void ratio of this soil

$($c$)$ how much water is need when adding this soil sample to saturated condition?