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- 4. Draw the mechanism of the following reaction.4. Identify the reagents (a–h) needed to carry out each reaction. Provide an explanation to your answer.llustrate the mechanism of the reaction. Include the intermediate product and by-product formed in the reaction. (see attached photo)A. Draw the two products of the reaction below: B. Identify the major product of the reaction and draw the mechanism leading to the formation of that product.