b$)(9$ pts$)$ At steady$-$state the net rate of biomass $($MLVSS$)$ growth is wasted $($neglecting loss of cells in the secondary effluent$).$ If the daily biomass wasting rate is one eighth $(\frac{1}{8})$ of the total biomass in the system, what is the effluent BOD concentration? Use the following kinetic coefficients and assume the activated sludge reactor behaves as a CSTR$.[$Note part $($b$)$ may be solved independently from your answer to part $($a$)].$

$)>>(K_s$