i.) Administrative Employees are paid a salary, but they also receive a bonus at regular intervals during the year. Add a class "Administrator" to the Employee class hierarchy.

ii.) Factory workers are paid a certain amount for each unit they make and their total pay is the number of units produced times the pay per unit. Add a class "FactoryEmployee" to the Employee class hierarchy.

iii.) Salespersons are paid a salary plus a commission on their sames times the commision rate. Add a class "Salesperson" to the Employee class hierarchy.

Now, prepare a complete PAYROLL program for a company in which each employee falls into one of the 3 categories - Administrative, FactoryEmployee or Salesperson.