please notice that it's c language Also please show and explain steps and I would be grateful for that

Type and turn in a complete C program to solve the following problem: You must read students data from the file which name "class_grades.txt" this file has in each line student_id and three different grades, the file contain up to 100 students but maybe contain less than 100, be care! (see picture 1) After your read the data you must compute the final grade for each students and save it in the new file which name "class_results.txt" by putting in each line student_id and his final grade, after the student list you must put number of students then you must compute the average of final grade and print it in the file, then print how many student above and below the average, finally you must print student_id for the student has the greatest grade and the student has the lowest grade. (see picture 2) You should have a four functions which take an array as parameter as follow: 1. To compute class average, the prototype must be: int average (int grades[], int no_of_students); 2. To compute number of students above the average, the prototype must be: int above (int grades[], int no_of_students); 3. To find the student has the greatest grade, assume there is only one student, the prototype must be: int greatest int grades[], int students[], int no_of_students); 4. To find the student has the lowest grade, assume there is only one student, the prototype must be: int lowest (int grades[], int students[], int no_of_students); Notes: 1. The project must be typed ( hand written assignments will not be accepted) 2. The project should be submitted on the due date. (Late project will not be accepted for any reason) 3. Copying the project will be treated as a cheating attempt, which may lead to FAILING the course. 4. There are discussion for the project, and the project will not be graded if the student didn't discuss his work. Picture 1 (demo for input file) class grades.txt 1000210 1000211 1000212 8 7 10 10 8 10 Picture 2 (demo for input file) class results.txt 1000210 1000211 1000212 27 20 24 # of students 3 average 20.3 above the average 2 below the average 1 greatest grade for 1000210 lowest grade for 1000212