1. Solve in java. Create an abstract class Employee with the following instance variables (protected):

• Employee name (string)
• Employee number (string)
• Hire date (string you do not have to use the Date class)

Then create a concrete subclass: ProductionWorker that inherits from Employee, and in addition contains the following instance variables (protected):

• Hourly pay rate (double)
• Shift (in: 1 = Day, 2 = Night)

Next create a concrete subclass: ShiftSupervisor that inherits from Employee, and in addition contains the following instance variables (private):

• Annual salary (double)
• Annual bonus (double)

Lastly create a concrete subclass: TeamLeader, which inherits from ProductionWorker, and in addition contains the following instance variables (private):

• Monthly bonus (double)
• Required training hours (int)
• Number of training hours attended (int)

For each class above write one or more constructors (do not forget to call the superclasss constructor!); the get and set routines for each instance variable are optional.

Create 4 production workers, one team leader, and one shift supervisor In the main routine; do NOT prompt the user for the data). Do NOT instantiate any objects of the Employee class directly. Each class must be defined in a separate .java file; every class must have a toString() method. The main routine should be in a separate driver class, and must use each objects toString() method to display the values of the objects fields.