Which of the following describes boundaries?
(1)Boundaries are primarily used to indicate which functions a user will perform as opposed to the functions that a product will perform.
(2)Boundaries are primarily used to indicate which functions a product will perform as opposed to the functions that a user will perform.
(3)Boundaries are always used to indicate which functions a product will perform and never used for the functions that a user will perform.
(4)Boundaries are rarely used to indicate which functions a product will perform and are always used for the functions that a user will perform.