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Problem 4 (10 points): The following graph the concentration versus radius profile for a catalyst pettet with a first order reaction for three different Theile modulii. (a) Label the graphs as for the large, medium and smail order Thiele moduli. (b) For a small Thiele modulus, is the reaction limited by surface reaction or internal diffusion. For a large Thiele modulus, is the reaction limited by surface reaction or internal diffusion. Problem 4 (10 points): The following graph the concentration versus radius profile for a catalyst pettet with a first order reaction for three different Theile modulii. (a) Label the graphs as for the large, medium and smail order Thiele moduli. (b) For a small Thiele modulus, is the reaction limited by surface reaction or internal diffusion. For a large Thiele modulus, is the reaction limited by surface reaction or internal diffusion