Question: a- Draw the query graph. b- Draw the query tree corresponding to the relational algebra expression. c- Draw the initial query tree, then show how

a- Draw the query graph. b- Draw the query tree corresponding

to the relational algebra expression. c- Draw the initial query tree, then

a- Draw the query graph. b- Draw the query tree corresponding to the relational algebra expression. c- Draw the initial query tree, then show how the same query tree is optimized by heuristic rules optimization in another figure. Q 3: SELECT E.Fname, E.LName, E.Address FROM EMPLOYEE E, DEPARTMENT D WHERE D.DName='Research' AND D.Dnumber=E.Dno

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