A monomer is polymerized at 75C in a benzene solution with a benzoyl peroxide initiator at an initial concentration 104mol/L in a batch reactor in which 40% of the original monomer charge is converted to polymer in 1h. Assume that kd=1.48105s1. (a) How much time would be needed for 40% conversion in another batch run at the same reaction temperature but with four-fold initial initiator concentration? (b) If another batch is run in the same reactor with the same initial monomer concentration, how long will it take to polymerize 90% of the original monomer charge in a benzene solution containing an initial initiator concentration 102mol/L of benzoyl peroxide at the same reaction temperature? Assume that all of the reaction rate coefficients remain the same