Q3: Consider the following subset of a database schema: EMP(ENO, ENAME, TITLE) , ASG(ENO, PNO, RESP, DUR) and the following simple user query: "Find the names of employees who are managing a project" The expression of the query SQL syntax is: " Select ename from emp, asg where emp. eno = asg.eno and resp = 'manager' " Two equivalent relational algebra queries that are correct transformations of the query above are: Assume that relations EMP and ASG are horizontally fragmented, where Fragments ASG1, ASG2, EMP1, and EMP2 are stored at sites 1, 2, 3, and 4, respectively, and the result is expected at site 5. Calculate: The total cost of strategy A ?