\begin{tabular}{|c|l|} \hline DNUMBER & DLOCATION \\ \hline 1 & Houston \\ \hline 4 & Staftord \\ \hline 5 & Bellire \\ \hline 5 & Sugartand \\ \hline 5 & Houston \\ \hline \end{tabular} Specify the following queries on the database schema shown in above Figure using the relational algebra discussed in class. 1. Find name of projects controlled by department 5 2. Find the names of male employees that works for 'Research' department 3. List department locations for department "Research" 4. Retrieve the names of employees who work on the 'Computerization' project. 5. Retrieve SSNs of department managers who do not work on any project. 6. Find the names and addresses of employees who work on project located in Stafford. 7. List the last names of employees who have no dependents. 8. Find average salary of employees who works for 'Administration' department 9. For each department number, list the total number of project controlled by the department. 10. For each employee, retrieve employee's name, and the total hours working in projects