A) Show the complete step by step reaction mechanism for the formation of the product given. For full credit show how the relative stereochemistry is obtained. (5pts) B) On standing with O17 labeled water and acid (H+), acetaldehyde incorporates the labeled oxygen in roughly a 50/50 ratio. Explain this observation. Show a mechanism for full credit. (5 pts.) C) Provide a complete mechanism for the formation of the cyclic disulfide. ( 5 pts.) Br2NaOHH2O