Part $1$: Implement a superclass Employee that has the following fields and methods.

Fields:

string firstName

string lastName

int employeeID

double salary

Methods:

constructor method $-$ initialize salary field to zero.

setters and getters for firstName, lastName, and employeeID

employeeSummary method $-$ prints all account attributes

Part $2$: Implement a Manager class that inherits from the Employee class.

Fields:

string department a

Methods:

employeeSummary method $-$ prints all superclass and subclass attributes

Ensure that your program has the two required classes and a test class.

Place each Java class into a separate Java source file.