Mathematics homework help. 1. Consider the following relational database:lives(person-name, street, city)works(person-name, company-name, salary)located-in (company-name, city)manages( person-name, manager-name)Give an expression in the relational algebra for each of the queries below:f. Find all people who do not work for First Bank Corporation.g. Find all people who earn more than every employee of Small Bank Corpo-ration. h. Assume the companies may be located in several cities. Find allcompanies located in every city in which Small Bank Corporation is located.