The Contact class represents any person who is a business associate, friend, or family member. Its attributes are:

• Contact first name.
• Contact last name.
• Contact street.

The Zip Location class represents a geographical location whose boundaries have been uniquely defined by the United States Postal Service for mail delivery. Its attributes are:

• Zip code.
• City.
• State.

The association between Contacts and Zip Location classes is:

• Each contact lives in one and only one zip location.
• Each zip location is lived in by one to many contacts.

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