1) A continuous stirred tank reactor (CSTR) is being used for biological wastewater treatment. The following parameter values apply. Sin 1h max KM Yx b 1000 mg/l 100 0.40 h 120 mg/1 0.45 mgx/mgs 0.007 h' influent substrate concentration flow rate maximum specific growth rate Monod half saturation coefficient Yield coefficient decay rate coefficient a) What size reactor would be required to reduce the soluble substrate concentration to 20 mg/1? b) What would the effluent substrate concentration be if the reactor volume were doubled from part (a)? c) What would the effluent substrate concentration be if two reactors of the same volume as in part (a) were operated in series