Write a C program using switch and while statements to continuously read a character and classify it as a vowel or consonant if the entered character is an alphabet. If the entered character is not an alphabet, then the program will print "Not an English alphabet". The program will stop when an EOF character is entered. Notes: Vowels are 'a', 'e', 'i', 'o', and 'u' letters. A letter can be either uppercase or lowercase