A soluble organic industrial wastewater has a bod5 of 410 mg/ℓ and is to be treated by the activated sludge process to produce an effluent bod5 of 20 mg/ℓ. The flow is 2.0 MGD (15.1 MLD). The rate constant K is 0.226 ℓ/(gm mlvss-hr). The mlss concentration is 3000 mg/ℓ, the mlvss is 75% of the mlss, and the sludge density index is 9000 mg/ℓ. Determine, using USCS units:a. The reaction time and reactor basin volume for a plug-flow reactor.b. The reaction lime and reactor basin volume for a dispersed plug-flow reactor if the dispersion number is 0.2.c. The reaction time and reactor basin volume for a completely mixed reactor.