It is required to give top element and pop a stack under the linked list implementation

of stacks using the following steps.

$($i$)\{$

$($ii$)\}$

$($iii$)$ return topItem ;

$($iv$)$ if $($isempty $())$

$($v$)$ object topItem $=$ topOfStack.element ;

$($vi$)$ topOfStack $=$ topOfStack.next ;

$($vii$)$ return null ;

$($viii$)$ public objectTopAndPop$()$

What is$/$are the correct order of the routine?