I NEED HELP WITH THESE QUESTIONS:

Consider a database consisting of the following tables:

• Person(Pname, Street, City, Cname, Salary)

• Company(Cname, City, Sales)

• Branch(Cname, City)

• Primary Key is underlined in each relation. The Person relation provides the information about a person including the name, address(street and city), the company for which the person works, and his/her salary. The Company table provides the city in which the company is headquartered plus the company's total sales. The Branch relation provides the cities in which the company has branches (might be different than HQs city).

• Write expressions in Relational Algebra(RA), to retrieve answers to each of the following queries. Also, write queries in Tuple Relational Calculus(TRC) that retrieve the answers to the first three queries.

• Question 1: Find the names and addresses (i.e., Street, City) of all employees who work for Facebook.

• Question 2: Find the names of employees that work for a company headquartered in Chicago.

• Question 3: Find the names of all employees who work for companies that only have branches in Chicago.