Write a method called makeRow that is passed two arguments, an int n and a String s, and which returns a String containing n copies of s, concatenated in a row. For instance, if we call the method with makeRow (5, "*"), the method returns *****, Write a main method that uses the method to print the string =. Exercise 5: middle (String) Write a method public static String middle(String str) that returns a string containing the middle character in str if the length of str is odd, or the two middle characters if the length is even. For example, middle("middle") returns "dd". You can process any user-input String