MUST COMMENT FOR EACH LINE OF CODE

4.23 Write a function average () that takes no input but requests that the user entera sentence. Your function should return the average length of a word in the sentence >>> average () Enter a sentence: A sample sentence 5.0 25 Write function vowelCount that takes a string as input and counts and prints the number of occurrences of vowels in the string. >>> vowelCount ('Le Tour de France ") a, e, i, o, and u appear, respectively, 1, 3, 0, 1, 1 times Use python 3.7.2 for language Comment for each line of code Good coding names