I need help learning how to create these methods.*************** I cannot use a import whatsoever**************

public class BaseDeque implements Deque {

@Override public void enqueueFront(Item element) {

}

@Override public void enqueueBack(Item element) { }

@Override public Item dequeueFront() throws NoSuchElementException { return null; }

@Override public Item dequeueBack() throws NoSuchElementException {

return null; }

@Override public Item first() throws NoSuchElementException {

return null; }

@Override public Item last() throws NoSuchElementException { // TODO Auto-generated method stub return null; }

@Override public boolean isEmpty() { return false; }

@Override public int size() {

return 0; }