Below is a function called vowel_check(x), which returns True if x is a single character and a vowel and returns False otherwise (this is a slightly modified function from the previous tutorial). Be sure to read the code in the function and understand how it works. Copy this function inta your current python program you are writing in the Wind IDE def vowel_check (x): # if char is not a single character return False if len (char)!-1: return False return x in "aeiouAEIOU" Using this function you are to write a new function called count_vowels(s), which takes a string s as input and returns the number of vowels in it. For example, count_vowels( kitten") will return 2, and count_vowels("cbc-2") will return 0. Your function should call the vowel _check() function as a helper function. Test your function. Make sure you test your function with several input strings and check that the answer is as you expect. Check that it works for both upper and lowercase vowels