Formulate SQL queries for (a) and (b) with reference to the database specified for homework 2. Ensure that your SQL queries will produce a correct response for every instance of the database. a. List the employeeid and salary of those supervisors whose supervisees, collectively, have received at least one order. There should be one record per eligible supervisor. b. List the employeeid and salary of salespersons who have received orders from at least ten different customers.