In this exercise, you modify the program from ADVANCED Exercise 31. If necessary, create a new project named Advanced32 Project and save it in the Cpp8\Chap13 folder. Also create a new source file named Advanced32.cpp. Copy the instructions from the Advanced31.cpp file into the Advanced32.cpp file. Change the filename in the first comment. Modify the program so that it displays the letters already entered by the user. Display the letters immediately before prompting the user to enter a letter. Save and then run the program. Test the program appropriately.