9. Use these relations to solve the queries that follow:

employees(eid, name, salary,did,m_eid)

projects(pid,description)

works_on(eid, pid, hours)

departments(did, location)

Note that Pid is also the name of the project and m_eid is the manager id.

Solve only in SQL: List the name of the manager that manages the department with most employees (manager of the largest department).

10.Use these relations to solve the queries that follow:

employees(eid, name, salary,did,m_eid)

projects(pid,description)

works_on(eid, pid, hours)

departments(did, location)

Note that Pid is also the name of the project and m_eid is the manager id.

Solve in both SQL and Relational Algebra: List the name of employees working on both projectX and projectZ but not working on projectY