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Specify and execute the following queries for the database in Exercise 3.16 using the RA interpreter.

a. Retrieve the names of students who have enrolled in a course that uses a textbook published by Addison-Wesley.

b. Retrieve the names of courses in which the textbook has been changed at least once.

c. Retrieve the names of departments that adopt textbooks published by Addison-Wesley only.

d. Retrieve the names of departments that adopt textbooks written by Navathe and published by Addison-Wesley.

e. Retrieve the names of students who have never used a book (in a course) written by Navathe and published by Addison-Wesley.

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