You created an input mask so that each number is formatted like this: (xxx) xxx-xxx. You try entering a phone number without the area code and are unable to. You're satisfied you made the right choice in setting up the phone number field. Now that you have the table set up, you need to create a relationship to another table. You decide to connect it to the Agents table to show how each client is assigned to an agent. What kind of relationship should you create between these tables? Many-to-many. One-to-many. One-to-one.