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. pop$()$;

stack. push$(50)$;

stack. push $(40)$;

stack. peek$()$;

stack. push$(100)$;

stack. printStack$()$;

Your answer:

$100$

$40$

$50$

$20$

$10$

$10$

$50$

$40$

$100$

$100$

$40$

$50$

$10$