i have added dreamhome database

3. Which clauses a query MUST have? 4. (Dre amHome database) A relational algebra expression is staffNo.lnamefname ( ?branchNo-B 005, ( Staff)) a) Write a SQL select statement for the algebra expression d on the data instance, how many rows and columns in the result? 5. (DreamHome database) A tuple calculus expression is S I Staff (S) A S.sex 'F'AS.branchNo B0O5' Write the select statement for the calculus expression. 6. (DreamHome database) A query is Select fname, lname from Client where maxRent