Q$6.$ If $30\mathrm{.}0mL$ of water that is $0\mathrm{.}0500M$ in $Q$ is to be extracted with four $10\mathrm{.}0-mL$ portions of an immiscible organic solvent, what is the minimum distribution coefficient that allows transfer of all but the following percentages of the solute to the organic layer:

$($a$)1\mathrm{.}00{10}^{-24}$

$($b$)1\mathrm{.}00{10}^{-22}$