Calculate the steady-state substrate and biomass concentrations in a continuous fermenter which has an operating volume of 25 L when the sterile feed stream contains limiting substrate at 2000 mg/l and enters the vessel at 8 L/h. The values of Ks and µm are 10.5 mg/L and 0.45 h-1 , respectively, and the yield coefficient may be taken to be 0.48?