(Solved): So far, we have discussed how acetals are protecting groups for ketones and aldehydes. Acetals are ...

So far, we have discussed how acetals are protecting groups for ketones and aldehydes. Acetals are formed from the reaction of alcohols with ketones or aldehydes under acidic conditions. Acetals can also be used as protecting groups for alcohols. Dihydropyran (1) is frequently used as a protecting group for alcohols in organic synthesis. Provide a reasonable mechanism for how this reaction occurs.