more -OH H HO HO OH Consider the structures of ascorbic acid (vitamin C) and cholecalciferol (vitamin D3) and answer the following questions: a) Why is vitamin C water soluble while vitamin D is fat soluble? b) Despite the name, ascorbic acid does not contain a carboxylic acid group. What functional groups can you identify in the structure then? Circle the functional groups and name them. c) The structure of ascorbic acid contains two chiral carbon atoms. One of these has R configuration and the other has S configuration. Which is which? Justify your answer by deciding the priority of the substituents (ie number the substituents) at both chiral carbon atoms and explain why these numbers lead to S-and R-configuration respectively. In your answer it should clearly indicate which carbon atom has which configuration