Knowing Postorder Traversal$$Algorithm:$$

Step$1$:$$Repeat$$Steps$2$to$4$while$$TREE$!=$NULL$$

Step$2$:$$POSTORDER$($TREE$->$LEFT$)$

Step$3$:$$POSTORDER$($TREE$->$RIGHT$)$

Step$4$:$$Write$$TREE$->$DATA$$

$[$END$$OF$$LOOP$]$

Step$5$:$$END$$

$$

What is the final output?$$

Group of answer choices

$\{40,30,25,15,28,35,50,45,60,55,70\}$

$\{15,25,28,30,35,40,45,50,55,60,70\}$

$\{15,28,25,35,30,45,55,70,60,50,40\}$

None of the above