Three CSTR are to be used in series. The second reactor has a volume twice that of the first and the third reactors. The influent flow has a conc. of 150 mg/L and the flow rate is 100 gal/min ( 380 L/min). The reaction is the first order and the rate of the equation is -dC/dt = KCa= -ra ( and the rate constant is 0.40 hr^-1 Determine: a- A graph of -ra on the y-axis versus Ca on the x-axis on arithmetic purpose. b- The mean residence time and volume of each reactor if the removal or conversion of A is 90%. what is the concentration of A and the rate of conversion in each reactor? use a graphic solution using the graph from part (a). Express volume as gallons or liters Please don`t post links and show the answers by numbers.