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DBA 110 D63Chapter 21. What is a relation?A relation is a two dimensional table that has single entries, distinct names, and the order is not important. All of the values in a column are values of the same attribute.2. What is a relational database?A relational database is a collection of relations.3. What is an unnormalized relation? Is it a relation according to the definition of the word relation?4. How is the term attribute used in the relational model? What is a more common name for attribute?