Exercise $3\mathrm{.}2\mathrm{.}8$ Devise quadruples for a Turing Machine with two tapes.

Each tape should have its own head. The machine should be able to perform an action on one of the two tapes, based on the symbol under each of the two heads. Devise such a Turing Machine to calculate $xy,$given that the first tape starts with $x1\text{'}$s and the second starts with $y1\text{'}$s$.$ When it finishes the first tape should have $xy1\text{'}$s and the second should be blank.