A $0\mathrm{.}4$ m$3$ moist soil sample has the following.

moist mass $=714\mathrm{.}5$ kg

dry mass $=620\mathrm{.}5$ kg

specific gravity of soil solids $=2\mathrm{.}68$

Calculate the following.

$($a$)$

moisture content $($as a percentage$)$

$15\mathrm{.}15$

$\%$

$($b$)$

moist density $($in kg$/$m$3)$

$1786\mathrm{.}25$

kg$/$m$3$

$($c$)$

dry density $($in kg$/$m$3)$

$1551\mathrm{.}25$

kg$/$m$3$

$($d$)$

void ratio

e $=$

$($e$)$

porosity