Biomass is being produced in a continuous stirred tank bioreactor of 750 L capacity. The sterile feed containing 8 g.L^–1 glucose as substrate was fed at a flow rate of 150 L.h^–1. The microbial system follows Monod's model with µm = 0.4 h^–1, K_s = 1.5 g.L^–1 and Y_x/s = 0.5 g cell mass-g substrate^–1. Determine the cell productivity (g.L^–1.h^–1) at steady state.