Determine and plot the E(1) curve for a reactor system consisting of two CFSTRs in series, with hydraulic detention times of 1 h and 2 h, respectively. Compare the result with that for the same reactors in the reverse order. (Hint: write the mass balances for two CFSTRs in series with arbitrary mean residence times 7 and T, to obtain a differential equation for the concen- tration exiting the second reactor. Solve the differen- tial equation either analytically using Laplace transforms or numerically, and then convert the cal- culated Cfinal versus f data to E(1) versus t.)