a) Using your knowledge of organic reaction mechanisms, explain the formation of EACH product (A,B) in the following reaction. This will require you to write out MULTIPLE mechanisms (i.e. each product comes from a different reaction pathway). Hint: all reaction pathways start from the same intermediate: NaH is a strong base but cannot deprotonate an sp3 C-H bond! OH OH 1) NaH (0.5 equiv) Br + 2) H20 A B b) Briefly explain why there is no epoxide (formed via an intramolecular substitution reaction) in the product mixture of the above reaction?