Write a program using a function Write a function vowels that receives an array of characters an its size, it returns how many vowel letters in that array. The vowel letters are A, E, I, O, and U. Your function should count these letters regardless of their case (small or capital). Write a main function that asks the user to enter 10 characters, reads these characters and stores them in an array. The program then calls the function vowels and prints the number of vowels result