Create ten different employees from a file: read employee data from a file(.txt or .json), then use generator to create a list of ten employees, sort the employee list by their name, use generator to raise every employees salary by 5%, then use generator to create a dictionary of the employees where the keys of the dictionary items are from range(10) and print them out. Furthermore, use itertoolss groupby() method to group employees by age group(younger than 20, 21-30, 31-50, 51-65, older than 65)