please help with this question. thank you.  The following sequence, beginning with a cyclic hemiacetal (compound A), was part of a recently reported enantiospecific synthesis of a powerful sex pheromone (currently used in pest management) of the mealybug Pseudococcus viburni: Draw the structures of compound B and C. Provide a plausible mechanism to explain the transformation from compound C into compound D. Identify the reagents you would need to convert compound D into compound F (in just two steps). Also identify the structure of compound E

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Aldehydes and Ketones

Aldehydes and ketones are organic compounds that have a carbonyl group, C = O, as their functional group. They both differ in the placement of this carbonyl group in their structures.