Please answer all sub-questions. Thank you.

This stoichiometric reaction occurs in the gas phase 4A3B+2C The reaction involves the following sequence of elementary steps: Ak1,k1I1+BA+I1k22I2I1+I2k3C a) Write the stoichiometric numbers for each elementary step. Then obtain an expression for the reaction rate (r) in terms of the reaction rate for step 3(r3).(10pts) b) Using your answer from part (a) and appropriate assumptions, obtain an expression for the reaction rate (r) in terms of rate constants and concentrations of reactants and products. (10 pts) c) Experimentally, at some conditions, the reaction rate exhibits the following dependence on the concentration of A and B : r=[B][A]2 What approximations are required in the rate expression obtained in part (b) to explain this dependence? (5 pts)