We need to create a database for a company. This company contains employees, and each employee belong to a department and has a Job. Each job has a grade with a minimum and maximum salary describing each job. The department exist in a certain location, and we found many locations in a country. The latter exist in a region a) Define the entities and their attributes (b) Build the ER diagram or the corresponding conceptual data model (CDM c) Build the corresponding relational/logical data model (LDM) and data types