Write a C++ program that takes a file (input.txt) as an input and run/implement four processes of CPU scheduling using a data structure called LINKED-LIST "this should be a menu for selection in your program" 1.First Come, First Served Scheduling 2.Shortest-Job-First Scheduling 3.Priority Scheduling 4. Round-Robin Scheduling (You should also obtain time quantum value) ) Note that Some Scheduling methods not run in Preemptive mode, you must also include that in your program. Write these results to output file that given with "-o" option and terminate simulator. ONLY LINKED-LIST Is allowed, use of arrays will not be graded