how to concatenate two singly linked lists in a way that we add all nodes in the second one to the first one without changing the second one at all. consider cases in which one of them is empty. I want the solution to be a function that takes two nodes as the heads for each list-In java in the same steps in the picture.

how to make sure that the coming parameters are head reference of linked lists? I thinkit is different that making sure that they are not empty lists.

Preconditions 11 and 12 are head reference of linked lists Both lists are not empty Postconditions A copy of list 12 1s concatenated (added to the end NOTE The nodes added to the list 11 must be copies of the /7 of list 11List 12 should be unchanged by the function odes in 1ist 12