Description of the detergent lab system as follows: The laboratory produces different types of cleaning materials in different departments, each department is responsible for producing a specific group of cleaning materials, and the department employs chemists who produce these materials for research. Each of them produces more than one type, and one type is examined by more than one chemist, as well as working in the department One is a group of workers and one worker works in more than one department as needed in that department, and the worker is paid for the hour. 1- Define the system entities and the rights of each entity 2- Draw erd 3- Define the primary and foreign keys in the different entities.