3. The following question involves the Robinson annulation reaction which starts with conjugate addition of the enolate onto the enone system (step i), followed by intramolecular aldol condensation (step ii). step i Intermediate A , Conjugate addition step i Intramolecular Aldol condensation Final product B a) Using curved arrows, show the mechanism for the conjugate addition and draw the structure of intermediate A formed in this part of the reaction. b) Using curved arrows, show how cyclization takes place in the addition product leading to formation of the final product B