Question Question 3. For each of the following reactions, give the substitution products, assuming that all the reactions are carried out under Sn2 conditions if the products can exist as stereoisomers, show what stereoisomers are formed: a: (3S,4S)-3-bromo-4-methylhexane+CH³O¯ b: (3R,4S)-3-bromo-4-methylhexane+ CH3O-