In this exercise I have to explain the mechanisms for that transformation.
I understand that the H+ protonates the OH and then the molecule loses the H2O and forms a carbocation, but I'm stuck there.
I know there is a rearrangement but I'm not able to see it. Maybe C1 will bond with C3 somehow? There are no H in C2 for the hydride shift to happen, is it coming from one of the methy on that C2? And after that it would react with water in a elimination reaction to form the double bond. It is just a gess, I know I'm missing something.