Textbook $2\mathrm{.}16$

Mirex $)=(540$ is a fully chlorinated organic pesticide manufactured to control fire ants. Due to its structure, mirex is very unreactive, so it persists in the environment. Water samples from Lake Erie have had Mirex measured as high as $0\mathrm{.}002\frac{g}{L},$ and lake trout samples have had $0\mathrm{.}002\frac{g}{g}.($a$)$ In the water samples, what is the aqueous concentration of mirex in units of $($i$)pp{b}_m,($ii$)pp{t}_m,$ and $($iii$)M?($b$)$ In the fish samples, what is the concentration of mirex in $($i$)pp{m}_m$ and $($ii$)pp{b}_m?$