You need to write a program that displays marks (as integers) given a student letter grade. Your program should be menu driven and input a character. Valid characters are 'A',B,C,D' and 'F. (as well as 'Q' for exit) Your program should accept lowercase letters and ignore invalid entries. The menu should be looping and stop when the user enters 'Q! You are given The downloadable Lab 2 documentation The downloadable Lab 2 template. The lab template consists of the file calculate MarksFunctions.cpp, calculate MarksHeader.h, calculate MarksMain.cpp What to do Use the given lab template. Populate the function displayMarks(char letterGrade) with the code where indicated. Include documentation for the program with header and line comments. If you are using MAKEFILES (OPTIONAL) do the following: Create a makefile with the command g++ calculate MarksFunctions.cpp, calculate MarksHeader.h, calculate Marks Main.cpp -o calculate Marks run this file using the linux commands chmod u+x calculate Marks ./calculate Marks Test that the program works Submission Guidelines