Assume that peek$(),$ pop$(),$ push$(),$ printStack$()$ methods are defined in the Stack class. Also Node class is defined.

Find the correct output:

stack.push$(10)$:

stack.push$(20)$

stack.push$(50)$

stack.push $(40)$

stack. peek$()$:

System.out.printin$($stack$.$ peek$())$ ;

Your answer:

$50$

$40$

$20$

$10$

$40$

$20$

$10$

$40$

$10$