The Universal Product Code (UPC) is a barcoded number that uniquely identifies many products sold in the United States. For example, all printed copies of this textbook sold in the United States have the same UPC bar code on the back cover. Now consider how the design of the RMO database might change if each individual item sold by RMO were required by law to carry a permanently attached UPC (e. g., on a label sewn into a garment or on a Radio Frequency Identification [RFID] tag attached to an item). How might the RMO relational database schema change under this requirement?