Biochemistry question

Write the structure of D-sedoheptulose (7 carbon ketose) in Fischer projection. C-3, C-4, C-5 and C-6 all have their alcohols on the right. Tag the groups that will be reacting in the hemiketal reaction. ( you will complete an intramolecular hemiketal reaction between the C-2 ketone and C-5 alcohol). Complete the intramolecular hemiketal reaction so you end up with the ring structure of α-D-sedoheptulose and β-D-sedoheptulose. Tag the relevant oxygens and hydrogens that participated in the reaction.

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