$1.$ Element of Class diagram

$2.$ Write a scenario that describes the relationships between the classes Company, Department, Office, Headquarter, and Employee. Consider how a company is structured and how employees are assigned to departments and offices.

$3.$ Identify all the relationships between the classes.

$4.$ Explain why inheritance is used between those classes and how it benefits the system design.

$5.$ Describe the differences between the private, public, and protected attributes and methods.

$1.$ Based on the diagram:

a$.$ Which attributes and methods are public?

b$.$ Which attributes and methods are private?

c$.$ Are there any protected elements? If not, explain when a protected attribute or method would be useful in an object$-$oriented system.