Problem $6.$ A lagoon is to be designed to accommodate an inflow waste stream at $0\mathrm{.}1\frac{m^3}{s}$ containing two nonconservative pollutants $($pollutant $A=45m\frac{g}{L},$ pollutant $B=20m\frac{g}{L}).$ The pollutants degrade following first order kinetics with reaction rate constants as follows: $A=0\mathrm{.}35$ day ${?}^{-1}$ and $B=0\mathrm{.}2$ day ${?}^{-1}.$ The effluent from the lagoon must meet the following design constraints: concentration of less than $10m\frac{g}{L}$ for pollutant A and less than $15m\frac{g}{L}$ for pollutant $B.$ Assuming complete mixing, and that there is an outlet for $0\mathrm{.}1\frac{m^3}{s},$ how large must the lagoon be$?($Assume steady state$).(20$ pts$,$ show calculations for both pollutants for full credit$)$ Last question was wrong, please help.