a) Draw the major organic substitution product (ignoring stereochemistry) formed in the following reaction. CH3 CH3 $= -Br HO 1-bromo-1,2-dimethylcyclohexane b) If the reactant's configuration were (1R,2R), then the configuration of the substitution product(s) will be (select all that apply): 1R,2R. 1S,2S. 1R,2S. 1S,2R.