1. Draw (R) and (5) configurations for the following compound. a) (HO)C(CH(COOH)(CH3) four different groups in the parenthesis. Draw (R) and (S) configurations for perspective drawing (3D) and (R) and (5) configurations for Fischer projections. Total 4 structures. (8 points) b) Assign either Ror Sconfiguration as appropriate for the following compound. (4 points) CH.CH ICH NH2 CH c) For the following compound indicate number of chiral centers with asterisk and how many isomers are possible. (6 points) OH OCH HO OH d) Figure out elements of unsaturation for the following compound (4 points) CsH&NOBY