please help, my code so far is

class List{ private Node head; public List(Node loopy){ loopy = this.head; } public int sum(){ } }

class Node { // instance variables private int value; private Node next; // constructor public Node(int value) { this.value = value; // get the next' variable public Node getNext() { return this.next; // get the 'value' variable public int getValue() { return this.value; // set the next' variable public void setNext(Node next) { this.next = next; TASK: Create a class called List that has the following properties: It should have one private instance variable of type Node called head . It should have a constructor with one parameter of type Node, which sets the head instance variable to the argument It should have a non-parametric public instance method called sum that returns the sum of head.value, head.next.value, head.next.next.value, etc. EXAMPLE: If we run the following code: Node node = new Node(1) : node.setNext(new Node (2)); node.getNext().setNext(new Node (3)); List list = new List(node); System.out.println(list.sum()); We should print 1 + 2 + 3 = 6