I think I am on the right track, am I? Is it with ? or just static? Can you explain why?

Sometime, we need something called a helper method to accomplish what we want with recursion. A helper method in this context is a private recursive method that will do all the actual recursion, while the public method is accessible to the user. This is typically done to pass in part of the state, such as the current index, for recursion. For example, we want to write a helper method for this public static void printArray(E[] arr) { printArray(arr,0); } Which will print the contents of the array for us. Let write that helper method. First, what is the method header? private static String printArray(E[] arr, int index){ private static void printArray(E[] arr, int index){