Write a program to determine which of three letters comes first in alphabetical order. Assume that the user properly enters three lower-case letters. Program Requirements: - Prompt the user to enter three lower-case letters from the keyboard. - Determine which character comes first in alphabetical order. - Output the character to the screen. Sample program output: Enter three lower-case letters: a c f The letter that comes first in alphabetical order is a. Enter three lower-case letters: kgn The letter that comes first in alphabetical order is g. Enter three lower-case letters: z yx The letter that comes first in alphabetical order is x. Assignment Requirements: - Write the program in the text editor of your choice. - Upload the C file to Zeus using an SFTP client (e.g. FileZilla). - Log into Zeus using an SSH client (e.g. PowerShell, PuTTy, or the terminal window). - Compile the program using the following command: gcc -o where is the name of the executable file that will be created by GCC, and is the name of the C file that is being compiled. - Test the program on Zeus. - If necessary, make changes to your program (in the text editor), upload the corrected C file to Zeus, recompile using GCC, and test your program again. - Repeat until you have a working program. Your program must work on Zeus. If it does not, you will not get credit for it. Submit your C source file as part of your homework solutions