Write a program called lab5.c which will prompt the user to enter a single letter or number on the keyboard. If the user enters a lower case letter, the program will print out the same letter as a capital letter. If the user enters a capital letter, the program will print out the same letter in lower case. If the user enters an even number, the program will print out a message saying that it is an even number. If the user enters an odd number, the program will print out a message saying that it is an odd number. If the user enters anything that is not a letter or a number, the program will print out a message indicating that they entered an invalid character. Once you get that working, make the program loop continually, asking the user if they want to go again, using a 1 for yes and a 0 for no. If they enter a 1, then they will be prompted to enter a single letter or number on the keyboard again, displaying the results explained above. If they enter a 0, then the program will quit. With this loop added, your output should look similar to the following: Enter a letter or number from the keyboard. d The upper case of that letter is: D. Would you like to go again? Enter 1 for yes, 0 for no. 1 Enter a letter or number from the keyboard. R The lower case of that letter is: r. Would you like to go again? Enter 1 for yes, 0 for no. 1