Exerclse 5.1 Specify the following queries in tuple relational calculus. (the respective tables are given in Figure 5.6 below) (a) Retrieve the names of employees in department 5 who work more than 10 hours per week on the 'ProductX' project. (b) List the names of employees who have a dependent with the same first name as themselves. (c) Find the names of employees that are directly supervised by 'Franklin Wong'. (d) Retrieve the names of employees who work on every project. (e) Retrieve the names of employees who do not work on any project. (f) Find the names and addresses of employees who work on at least one project located in Houston but whose department has no location in Houston. (g) List the last names of department managers who have no dependents. EMPLOYEE DEPARTMENT DEPT_LOCATIONS \begin{tabular}{|l|c|c|c|} \hline \multicolumn{1}{|c|}{ Dname } & Dnumber & Mgr_ssn & Mgr_start_date \\ \hline Research & 5 & 333445555 & 19880522 \\ \hline Administration & 4 & 987654321 & 19950101 \\ \hline Headquarters & 1 & 888665555 & 19810619 \\ \hline \end{tabular} \begin{tabular}{|c|l|} \hline Dnumber & Dlocation \\ \hline 1 & Houston \\ \hline 4 & Stafford \\ \hline 5 & Bellaire \\ \hline 5 & Sugarland \\ \hline 5 & Houston \\ \hline \end{tabular} WORKS_ON PROJECT \begin{tabular}{|c|c|c|} \hline Essn & Pno & Hours \\ \hline 123456789 & 1 & 32.5 \\ \hline 123456789 & 2 & 7.5 \\ \hline 666884444 & 3 & 40.0 \\ \hline 453453453 & 1 & 20.0 \\ \hline 453453453 & 2 & 20.0 \\ \hline 333445555 & 2 & 10.0 \\ \hline 333445555 & 3 & 10.0 \\ \hline 333445555 & 10 & 10.0 \\ \hline 333445555 & 20 & 10.0 \\ \hline 999887777 & 30 & 30.0 \\ \hline 999887777 & 10 & 10.0 \\ \hline 987987987 & 10 & 35.0 \\ \hline 987987987 & 30 & 5.0 \\ \hline 987654321 & 30 & 20.0 \\ \hline 987654321 & 20 & 15.0 \\ \hline 888665555 & 20 & NULL \\ \hline \end{tabular} \begin{tabular}{|l|c|l|c|} \hline \multicolumn{1}{|c|}{ Pname } & Pnumber & Plocation & Dnum \\ \hline ProductX & 1 & Bellaire & 5 \\ \hline ProductY & 2 & Sugarland & 5 \\ \hline ProductZ & 3 & Houston & 5 \\ \hline Computerization & 10 & Stafford & 4 \\ \hline Reorganization & 20 & Houston & 1 \\ \hline Newbenefits & 30 & Stafford & 4 \\ \hline \end{tabular} DEPENDENT \begin{tabular}{|c|l|c|c|l|} \hline Essn & Dependent_name & Sex & Bdate & Relationship \\ \hline 333445555 & Alice & F & 19860405 & Daughter \\ \hline 333445555 & Theodore & M & 19831025 & Son \\ \hline 333445555 & Joy & F & 19580503 & Spouse \\ \hline 987654321 & Abner & M & 19420228 & Spouse \\ \hline 123456789 & Michael & M & 19880104 & Son \\ \hline 123456789 & Alice & F & 19881230 & Daughter \\ \hline 123456789 & Elizabeth & F & 19670505 & Spouse \\ \hline \end{tabular} Figure 5.6