predict the major organic product of the given reaction. the starting material is a 4 carbon chain where carbon 1 is double bonded to oxygen and single bonded to ethoxide. carbon 3 is double bonded to an oxygen. the reaction sequence consists of five steps. step 1 is n a o e t in ethanol. step 2 is c h 3 c h 2 c h 2 b r. step 3 is dilute n a o h and heat. step 4 is h 3 o plus. step 5 is heat. complete the curved‑arrow mechanism for the scheme by adding any missing atoms, bonds, charges, nonbonding electrons, and curved arrows. do not delete any pre‑drawn bonds, charges, or lone pairs. if you accidentally delete a vital part of the structure, click the undo button in the lower left.