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Sultan Qaboos University Department of Computer Science COMP2102 Problem Solving and Programming, Spring 2108 Homework Assignment 4 Due: Tuesday 01 May 2018, 11:55pm Submission: Name your program file HW4_ID.cpp, where ID is your student ID and submit it on Moodle by the above due date/time Write a C++ program that starts by reading student information from an input file student.txt organized as follows: each student has four fields of information on one line of the input file: name (at most 25 characters, terminated by a character), ID integer), cohort (integer), and three scores (each score is an integer between 0 and 100). The program must store this information in a sorted linked list of student records (structures). The list must be kept always sorted in increasing order of the ID. The program must calculate for each student a letter grade (and store it in the student record) based on the average of his/her 3 scores according to the following: Average of the 3 Scores Letter Grade 290 80 and