A continuous biochemical reactor, fermenter, with an operating volume of 100 (b) litres is fed with sterile feed containing limiting sub:trate of 3500 mg/L at a rate of 20 litres per hour. Calculate the steady state substrate and biomass level? Assume the yield coefficient is 0.65, Monod constant is 20.5 mg/L and a maximum growth rate of 0.8 per hour. (12 marks)