Update README.md

Author: codex-avee

ExerciseFive/README.md

@@ -17,6 +17,7 @@ Using the Word Utility that you developed in [Exercise One](../ExerciseOne/READM
 Once the user added the sentence display:
 
 	* the number of words in the sentence
+	* the average word length
 	* the longest word
 	* the shortest word
 
@@ -39,4 +40,4 @@ Display all the words in the sentence and allows a user to display:
 	* only the words that end in selected letters.
 	* words of the selected length
 	* words longer than the selected length
-	* words shorter than the selected length
+	* words shorter than the selected length