System Requirements:A. To make the

System Requirements:A. To make the program as user-friendly as possible, use the following menu to start.1. Import grades for a course2. Delete a course3. Calculate GPA4. Export file with GPA5. Quit User will choose the functions using the index number:1: ask user to import a file from which the grades will be added to students.txt. a) The program should ask the user to input the course name before input the file name. It is assumed that the length of course name is less than 20.b) If the course name inputted by user exists in students.txt, gives user a warning. User can choose to replace the old grades with new or not. If user choose not to replace, go back to main menu.c) If the course name does not exist in students.txt, ask the user to give the file name to import.d) If it is found that a student ID in this imported file cannot be found in the students.txt, do not import and give the warning. Each ID contains 10 digits.It is assumed that each file has been sorted according to ID in ascending order before it is imported.