Consider the following linked list representation: head $[12][45][78][34][$null$]$

Which of the following code snippets will set the node containing $78$ as the last node of your list?

$1)$ Node current $=$ head; while $($current$.$getNext$()!=$ null$)\{$ current $=$ current.getNext$()$; $\}$ current.setNext$($null$)$;

$2)$ Node current $=$ head; while $($current$.$getNext$()!=$ null$)\{$ current $=$ current.getNext$()$; $\}$ current.setNext$($null$)$; current.setInfo$(78)$;

$3)$ Node current $=$ head; while $($current$.$getNext$()!=$ null && current.getInfo$()!=78)\{$ current $=$ current.getNext$()$; $\}$ current.setNext$($null$)$;

$4)$ Node current $=$ head; current.setNext$($current$.$getNext$().$getNext$())$;