Write the mechanism that explains the following transformation:

 
Problemas reacciones de alquenos
 
SOLUTION:
 
Problemas reacciones de alquenos
 
[1] Alcohol protonation
[2] Loss of water, with formation of the tertiary carbocation.
[3] Methyl rearrangement
[4] Unimolecular elimination, promoted by the bases of the medium