a$)$ You are tasked with designing a conceptual schema for a corporate database system.

The system is required to record details about its employees, the organizational units they

belong to$,$ and their immediate family details as follows:

Employees: Each employee must be uniquely identifiable by an Employee ID $($EID$)$ and

associated with specific details such as salary and contact number.

Departments: Departments within the company should be distinctly recognized by a

Department ID $($DID$),$ and should include a department name $($dname$)$ and allocated

budget.

Employee's Children: For the employees' children, the database should store their names

and ages.

Additional requirements include:

An employee is associated with departments.

Each department has one employee who acts as its manager.

Children are uniquely identified by their name given the employee parent is known.

The children's data is relevant only as long as the employee parent is employed by the

company

b$)$ Using the information above, create an Entity$-$Relationship $($ER$)$ diagram that accurately

displays these requirements. Ensure that your diagram specifies all necessary entities,

relationships, and constraints as described.