The SQL statements comprising the DDL for the COMPANY Database are given to you. For that database, answer the following queries. Create the files Q1 to Q10 in PostgreSQL. Do follow the restrictions stated for individual queries. When a query asks for "name" of employees, retrieve both, the first and the last names.

4. Retrieve the names of all employees of the Research department who work more than 10 hours per week on the ProductX project.