threSuppose the following stack functions have been implemented for you:

$/*$ Creates$/$Frees a stack of strings $*/$

Stack $**ps=$ createStack $()$;

freeStack$($ ps$)$;

$/*$ Add element $x$ to queue$/$stack $*/$

push $($ ps$,$ x $)$;

$/*$ Check if stack are empty $*/$

isEmpty $($ ps $)$;

$/*$ Remove element from stack $*/$

$x=$pop$(ps)$;

Write a simple function which swaps the contents of two given stacks.

Hint: Use one or more additional stacks to accomplish this.

void swap$($ Stack$*$ a$,$ Stack$*$ b $)\{$

Suppose the following stack functions have been implemented for you:

$1/*$ C r e a t e s $/$ F r e e s a s t a c k o f s t r i n g s $*/$

$2$ Stack $*$ ps $=$ c r e a t e S t a c k $()$ ;

$3$ f r e e S t a c k $($ ps $)$ ;

$4$

$5/*$ Add e l e m e n t x t o queue $/$ s t a c k $*/$

$6$ push $($ ps $,$ x $)$ ;

$7$

$8/*$ Check i f s t a c k a r e empty $*/$

$9$ isEmpty $($ ps $)$ ;

$10$

$11/*$ Remove e l e m e n t from s t a c k $*/$

$12$ x $=$ pop $($ ps $)$ ;

Write a simple function which swaps the contents of two given stacks.

Hint: Use one or more additional stacks to accomplish this.

void swap$($ Stack$*$ a$,$ Stack$*$ b $)\{$