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11. (4 points) The mechanism of this reaction involves which of these steps in which order? II () a. I, then II, then IV b. I then III c. II then III d. I then IV 12. (4 points) What is the most likely product when this epoxide is treated with CH3MgBr ? a. I because this reaction is more SN l-like and not in acid (in first step), since the first step is nucleophilic attack on the more hindered carbon. b. I because this reaction is more SN 2-like and not in acid (in first step), since the first step is nucleophilic attack on the least hindered carbon. c. II because this reaction is more SN2-like and not in acid (in first step), since the first step is nucleophilic attack on the least hindered carbon. d. II because this reaction is more SN l-like and not in acid (in first step), since the first step is nucleophilic attack on the more hindered carbon