Please do number 4 (c++)in simplest way possible so I can understand. Thanks

Programming Practices 159 I. Create a batch file and store twenty integer numbers. Write a C++ program to open this file in read mode. Display the content of the file. 2. Wri te a program to read the records of twenty students. Each record has student's name, number of courses, and major; store them in an array size 20. There are three exams per course. Compute average grade for each course and find the GPA of each student. Create a batch file to store the twenty students' records. 3. Write a program to create a binary file. Read twenty real numbers type of double and write them in the binary file. Display the content of binary file using type casting method. Write a C++ program to create a file as write and read mode. Ask user to enter twenty names and write them to the file. Display the content of the file. 4. Project 1: Employees 5. Write a C++ program to create a batch file for twenty employees. Read name, ID, weekly hours, and rate per hour of twenty employees. Compute gross salary. If gross salary exceed $2,500.00, then deduct 33% tax; otherwise, deduct 24% tax. Compute tax and net salary. write weekly hour rate per hour, gross salary, tax, and net salary of all employees in another batch file. Display all information for all employees. Make sure your program does the following: . Creates a file called Original.txt Types twenty employees information and saves the file