Write a program that uses File I/O (input and output files). This is a Java program

Use python 3.5 Please define main and invoke it.

Java Your program must read a file called personin.txt.  Each line of the file will be a person's name, the time they arrived at the professor's office, and the amount of time they want to meet with the professor.  These entries will be sorted by the time the person arrived.   Your program must then print out a schedule for the day, printing each person's arrival, and printing when each person goes in to meet with the professor.  You need to print the events in order of the time they happen.  In other words, your output will be sorted by the arrival times and the times the person goes into the professor's office. In your output you need to print out a schedule.  In the schedule, new students go to the end of the line.  Whenever the professor is free, the professor will either meet with the first person in line, or meet with the first person in line if nobody is waiting.  Assume no two people arrive at the same time. You should solve this problem using a stack and a queue. You can only…

Design a modular program in Python to process payroll for all hourly paid employees, save all the data into a text file and make a backup file as well. The program should allow user enter each employee's ID, name, hours worked, and hourly pay rate. And then calculate gross pay with overtime hours(hours beyond 40) paid 50% more. And then the program should display pay statement for each employee and store them into a same text file. The program should display total number of employees, total number of hours worked by all employees, and total gross pay and save them at the end of the same text file as well. The program should contain the following functions: main(), get_employee_info(), calc_gross_pay(hours, rate), display_pay_statement(emp_id, emp_name, hours_horked, hourly_pay_rate, gross_pay), save_pay_statement_to_file(file_object, emp_id, emp_name, hours_worked, hourly_pay_rate, gross_pay), save_summary_to_file(file_object, number_of_employees, total_hours_worked, total_gross_pay).…