Consider the following schema Employee (SSN, FName, LName, Address, Dno, Mgrssn, San Department (Dnumber, Dname, Location, Dmgrssn) SELECT Fname, Lnamo, Address FROM Employee, Department Whoro Dnamo"Research' AND DnumberDno: Consider the above query 1. Draw at least two query trees that can represent the query. Under what circumstances would you use each of your query trees? il. Draw the initial query tree for the query and then show how the query tree is optimized by the algorithm studied