Suppose that a database includes the following relations.

$$ employee$($id$,$ name, address, age, dept$\_$no$*)$

$$ department$($dept$\_$no$,$ dept$\_$name, location, building$)$

$$ project$($projectNumber$,$ subject, level, dept$\_$no$*)$

$($i$)$ The Users of the database are:

$$ Isavella who is authorised to do anything with the relations;

$$ Laura who can see and change all employee details, but cannot add or delete new employees and cannot access the other relations;

$$ Naser who has the same authorisation as Laura.

Write SQL statements that give these Users the access described above.

$(6$ marks$)$

$($ii$)$ Suppose that there is another User, Jane, who can only see projects for which level$=$advanced; she is not authorised to do anything else. Write SQL statements that implement this.

$(5$ marks$)$

$($iii$)$ Now suppose that Naser has now moved to another company and, therefore, should no longer have access to the database. Write a SQL statement to implement this.