Question: This is database system concepts. Give an expression in relational algebra to express each of the following queries: employee(person_name, street, city) works(person_name, company_name, salary) company(company_name,

This is database system concepts. Give an expression in relational algebra to express each of the following queries:

employee(person_name, street, city)

works(person_name, company_name, salary)

company(company_name, city)

manages(person_name, manager_name)

1.Find the number of employees managed by each manager.

2.Find the names of all employees who earn more than every employee of "Small Bank Corporation"

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