Draw a suitable mechanism for the E1 reaction shown below.

Detailed E1 reaction mechanism with base, bromine leaving, and 1,2-methyl and alkyl shifts.

E1 reaction mechanism illustrating bromine leaving, base attack, and 1,2-alkyl shift.

E1 reaction mechanism with base, bromine leaving, and 1,2-methyl and alkyl shifts shown.

E1 reaction mechanism depicting bromine leaving, base attack, and 1,2-alkyl shift.