employee (person_name, street, city) works (person_name, company_name, salary) company (company_name, city) Figure 2.14 Relational database for Exercises 2.1, 2.7, and 2.12. 2.12 Consider the relational database of Figure 2.14. Give an expression in the relational algebra to express each of the following queries: a. Find the names of all employees who work for "First Bank Corporation". b. Find the names and cities of residence of all employees who work for "First Bank Corporation". c. Find the names, street address, and cities of residence of all employees who work for "First Bank Corporation" and earn more than $10,000