The purpose of this assignment is to familiarize with Relational algebra and Relational calculus queries on Company database using WinRDBI. - For each of the following two queries, create a relational algebra query file: - List the firstname and lastname of each employee who has at least one work assignment with the project "ProductY". -[filename: q1 .alg] - List the firstname and lastname of employee(s) with the lowest salary value. - - [filename: q2.alg] - Create a domain relational calculus query file for the following query: - List the last names of managers of departments that employ at least one employee with 'SPOUSE' as a dependent. - [filename q3.drc ] - Create a tuple relational calculus query file for the following query: - List the firstname and lastname of employee(s) who has the highest hours on works_on. - [filenames: q4.trc] Use WinRDBI to test the queries. Upload all four files along with the following declaration through Canvas. Note that queries can include only the data values from the specification. Queries that include data values outside the specification will not receive any score