Specify the following queries in relational algebra on the database schema given in Exercise 5.16: a. List the number of courses taken by all students named John Smith in Winter 2009 (i.e., Quarter=W09). b. Produce a list of textbooks (include Course#, Book_isbn, Book_title) for courses offered by the ‘CS’ department that have used more than two books. c. List any department that has all its adopted books published by ‘Pearson Publishing’.
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