please read carefully, thank you so much. in C++ language

Template is not neccesary

2) ( 60pts) Create a flowchart and write C++ programs for each of the following. For each program: - Use the TCC template (see next page). Complete the items listed in the template. - Include plenty of comments. - The output should be neatly and clearly formatted. - Use good programming style and proper indentation. - Turn in a printout of the program and printouts for all required test cases. A) Letter Grade to Number: Write a program for Programming Exercise 4.12 on p. 151 in the textbook. - Testing: Run the program for: - Two valid lower case grades - Two valid upper case grades - Two invalid characters *4.12 (Convert letter grade to number) Write a program that prompts the user to enter a letter grade A/a,B/b,C/C,D/d, or F/f and displays its corresponding numeric value 4,3,2,1, or 0 . Here is a sample run: Enter a letter grade: B The numeric value for grade B is 3 Enter a letter grade: b The numeric value for grade b is 3