X$405$: iterateOverList

Consider the following class definition:

public static class Link $\{$

public Link next;

public Object data;

$\}$

Write a while loop to make q refer successively to each Node in the linked list headed by p$.$ q must end up referring to the last Node in the list. Given that the list L contains the elements $[\text{'}\_\text{'},\text{'}\_\text{'},\text{'}\_\text{'},\text{'}\_\text{'}]$ and p and q both point to the first $\text{'}\_\text{'}.$

Here is the initial set up:

and here is the expected final configuration