In the object$-$oriented design of an airline passenger reservation program, suppose that 'airplane seat,$\text{'}$ 'aisle seat,$\text{'}$ and 'window seat' have been identified as objects. Focusing specifically on the aisle seat object, how does it relate to the airplane seat object?

An is$-$a relationship

A has$-$a relationship

A has$-$a relationship and an is$-$a relationship

An independent and equal relationship

None of these is correct.