(a) Predict the structures of the major products A to C formed in the following reactions and comment on any matters of selectivity and/or stereochemistry. (i) HNO3,H2SO4A (ii) 1.MeMgBr,Et2O. H+,H2O [3 marks] [3 marks] (iii) [4 marks] Question 2 continued overleaf (b) Devise a synthesis of the heterocyclic compound 5 from starting materials each containing no more than six carbon atoms. In your answer you should use retrosynthetic analysis to justify your choice of approach. [10 marks ]