An enzymatic reaction occurs inside a continuous plug flow reactor with a volume of 10ft3. The reactor feed has a constant volumetric flow rate of 0.65ft3min1 and the inlet substrate concentration is 0.75kmolm3. The reaction follows MichaelisMenten kinetics with a maximum reaction rate of 4.92molL1h1. Under these conditions, 98% of the initial substrate concentration is consumed inside the reactor. Calculate the Michaelis-Menten constant of the enzymatic reaction