4. (10 POINTS) Consider the LIBRARY relational database schema below to write down the relational algebra expressions for the following two queries. No SQL statements are required. BOOK Book id Tite Publisher name BOOK AUTHORS Book id Author name PUBLISHER Name Address Phone BOOK COPIES Book idl-Branch_d1-No-of-copies BOOK LOANS Book id Branch id Card_no Date out Due date LIBRARY BRANCH Branch id Branch name Address BORROWER Card nO Name Address Phone A.) List the number of copies of the book titled "The Fountainhead" in the "Davis" library branch B.) List the number of copies of the book titled "The Fountainhead" owned by each library branch