Write the individual reaction steps (except chain transfer reactions) for the free radical polymerization of acrylonitrile using AIBN as an initiator. (Write both combination and disproportionation termination reactions). (30 points) What concentration of benzoyl peroxide (ka = 1.45 x 10-6 s1 at 60C) would be needed to polymerize 1 M solution of styrene to number average molecular weight of 125,000 Da. Assume that termination occurs only by combination that no chain transfer occurs, and that initiator efficiency is 80%. For styrene, kp = 176 L mol-4 5-2 and kt = 72 x 106 L mol s1 at 60C. (30 points)