We saw that acid-catalyzed dehydration of 2, 2-dimethylcyclohexanol afforded 1, 2-dimethylcyclohexene. To explain this product we must write a mechanism for the reaction in which a methyl shift transforms a secondary carbocation to a tertiary one. Another product of the dehydration of 2, 2-dimethylcyclohexanol is isopropylidenecyclopentane. Write a mechanism to rationalize its formation.