Given the following class:

class Rectangle implements Polygon $\{$

public void displayArea$()\{$

System.out.println$("$The area of a rectangle is calculated by width $*$ height."$)$;

$\}$

$\}$

What code segment would the interface need to look like?

interface Polygon $\{$

public void displayArea$()$;

$\}$

interface Polygon $\{$

public void displayArea$()$;

public void displayPerimeter$()$;

$\}$

interface Polygon $\{$

public void displayArea$()\{$

System.out.println$("$Woof woof"$)$;

$\}$

$\}$

interface Polygon $\{$

public String displayArea$()$;

$\}$