need help with c

2. Consider the following database employee (ID, person_name, sireet, city) works (ID, company name, salary) company (company_name, city) a. Write a relational algebra to find the ID and name for each employee who does not work for BigBank | b. Write a relational algebra to find the ID and Name for each employee who earns at least as much as every employee in the database c. Write a relational algebra to find the name of the employee with the highest salary 2. Consider the following database employee (ID, person_name, sireet, city) works (ID, company name, salary) company (company_name, city) a. Write a relational algebra to find the ID and name for each employee who does not work for BigBank | b. Write a relational algebra to find the ID and Name for each employee who earns at least as much as every employee in the database c. Write a relational algebra to find the name of the employee with the highest salary