"Please do it in Word document file format, Times Roman - Font Size = 12. 
Clearly differentiate each class templates and their program with heading.
kindly please elaborate each step and give it without errors in "c++".

1. Develop classes or class templates for the following:

i.) Administrative Employess 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, write a complete PAYROLL program for a company in which each employee falls into one of the 3 categories - Administrative, Factory Employee or Salesperson.