2. The production of AB is believed to take place according to the following sequence: A+B AB* +A k k AB* k3 K4 AB By applying pseudo steady state approximation to the sequence of elementary steps given above, a) Solve for the concentration of the active intermediate [AB*]. b) Derive the rate expression for the rate of AB production. c) Under what conditions will the rate expression reduce to the following expression: TAB - kk3 [A][B] k + k3 [A]