In C programming language

Create a program that prompts a user for a string less than 20 characters. The main program will call four separate functions One function will print all the lower case letters. One function will print all the upper case letters. One function will print total the number of vowels in the string. One function will save the number to an integer variable and pass it back to the main function(by reference) where it will be multiplied by 12 then printed out. You must pass all values to the functions by reference //Sample output Enter a string less than 20 characters that includes one number. this IS my 2 STRING Lowercase letters: this my Uppercase letters: S STRING Number of Vowels: Number 12 24