Consider the following schemas:

SQL database question help

My progress so far...

Stuck on number 4, Teacher emailed answer/general direction to get to number 5. Much appreciated

Consider the following schemas: Employee (empNo, name, age, address, sex, position) Department (deptNo, deptName, mgrEmpNo) Project (priNo, priName, deptNo Work On(empNo riNo date Worked, hoursWorked) Write the following queries in Relational Algebra 1) List employee's empNo and their manager's empNo 2) List the name of employees who work in "Robotics' department or "Database' department. 3) List the names of employees who work in both Robotics' department and 'Database' department. 4) List the names of managers who manage two different departments. 5) List the names of employees who are the most youngest employee