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Question 1. (10 Marks) Provide the MAJOR organic product(s) to complete the following transformations. All stereochemical consequences and relationships must be indicated in your answers. Question 2. (6 marks) Under each structure below, use the appropriate letter(s) to indicate whether the compound is an acetal (A), hemiacetal (HA), ketal (K), hemiketal (HK), or not applicable (NA): One of the compounds shown in the question above is a KETAL. In the space below, provide the carbonyl containing starting material(s) that under acidic conditions would form this ketal. Question 3. (10 Marks) Provide the missing starting material(s) or MAJOR product(s) to complete the following reactions. For full marks, ALL stereochemistry must be shown where appropriate. Question 4. (12 Marks) Complete the reaction scheme below by providing the major product(s) in the box. In the space provided below, give a complete step-by-step mechanism that leads to the product(s), including all mechanistic curved-arrows, lone pairs of electrons and any resonance structures if appropriate. Mechanism:

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