Considering the following method:

private void DisplayResult(int value1, int value2)

{

MessageBox.Show((value1 * value2).ToString());

}

Choose the wrong call(s) then explain why the call(s) is wrong.

1. DisplayResult(2, 3);

2. DisplayResult(10, a);

3. DisplayResult(20);

4. DisplayResult(value2:3, value1:5);

5. DisplayResult(ref 2, ref 3);

6. Int result = DisplayResult(2, 3);