13. TRACK WAGE CHANGES OVER THE COURSE OF TIME TAKING INTO ACCOUNT CHANGES IN CLASSIFICATION. THE A PERSON IS HIRED 7-1-21 AS A HOUSEKEEPER, IS PROMOTED TO MAINTENANCE HELPER ON 4-1-22, STANDARD SYSTEM. PAID BASED ON LENGTH OF SERICE AND CLASSIFICATION. (4 POINTS) 13. TRACK WAGE CHANGES OVER THE COURSE OF TIME TAKING INTO ACCOUNT CHANGES IN CLASSIFICATION. THE A PERSON IS HIRED 7-1-21 AS A HOUSEKEEPER, IS PROMOTED TO MAINTENANCE HELPER ON 4-1-22, STANDARD SYSTEM. PAID BASED ON LENGTH OF SERICE AND CLASSIFICATION. (4 POINTS)