QI: A trading company wish to maintain a database of its staff, the database is include name age, salary, address, department and count di stribution into a member of dlasses are shown in the follo wing figure. Find: 1- To initalize a count to zero (by using static). 2- Input data for all classes by using friend function. 3- Define friend function to income tax of all staff about 1%. 4- Display all staff in formation one year be fore retirement age. (retired age 63 year) Write main program deal with 100 worker, 100 employee and 100 management.

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