Please solve clearly and step by step.

An industrial facility generates three process wastewaters with the following characteristics: The plan is to combine the three wastewater streams and treat the combined stream in a completely mixed, suspended growth system with solids recycle. The cleanup goal is 100mg/L COD based on requirements set by a regulatory agency. Treatability tests of the combined wastewater indicate the following: 1) BOD: COD ratio of 1:2, 2) a biomass production rate of 0.8 mg/mg BOD removed, and 3) an endogenous decay rate of 0.06 day 1. We also know that the hydraulic retention time is 7 days and the sludge age is 50 days. Based on the above information, what will be the concentration of biomass in the bioreactor? Is this biomass concentration within the typical range for effective treatment using this technology