Consider the Employee Database. Give an expression in the relational algebra to express each of the following queries: Employee$($person$\_$id$,$ person$\_$name, street, city$)$ Works$($person$\_$id$,$ company$\_$name, salary$)$ Company $($Company$\_$name, city$)$ a$.$ Identify the Primary Keys, Foreign Keys b$.$ Show the details of all employees who lives in "Bahrain" c$.$ Find the name of each employee who lives in city "Miami" d$.$ Find the name of each employee whose salary is greater than $$10000.$ e$.$ Find the name of each employee who lives in "Miami" and whose salary is greater than $$10000$ f$.$ Find the ID and name of each employee wh