anchor.diff:          return line.toUpperCase();
       }
   
  +    // Takes a String and prints it LOUDLY!
  +    public static void printLoud(String line) {
  +        System.out.println(loud(line) + "!");
  +    }
  +
       // Takes a number and adds one to it
       public static double addOne(double number) {
           return number + 1;
  +    }
  +
  +    // Takes two numbers and multiplies them
  +    public static double multiply(double first, double second) {
  +        return first * second;
  +    }
  +
  +    // Takes an array of numbers and sums them
  +    public static double sum(double[] numbers) {
  +        double total = 0;
  +        for (int i = 0; i < numbers.length; i++) {
  +            total = total + numbers[i];
  +        }
  +        return total;
       }
   ----
   
  
positive.code:             System.out.println("Say something:");
              Scanner sc = new Scanner(System.in);
              String line = sc.nextLine();
              String loudLine = loud(line);
              System.out.println(loudLine + "!");
          }
  
          public static String loud(String line) {
              return line.toUpperCase();
          }
      }
  ----
  
negative.code: an age, and we can *do* the action of introducing ourselves.
  
  ----
      public class Person {
          String firstName;
          String lastName;
          int age;
  
          public String introduction() {
              return "Hi! My name is " + firstName + " " + lastName + " and my age is " + age + "years.";
          }
      }
  ----
  
  Notice that the 'introduction' method is *not* 'static' anymore. This means
  