Consider the following code:

class Shape $\{$

public int area$()\{$

return $0$;

$\}$

$\}$

class Square extends Shape $\{$

public int area$()\{$

return $25$;

$\}$

$\}$

class Program $\{$

public static void main$($String$[]$ args$)\{$

Shape a $=$ new Square$()$;

int value $=$ a$.$area$()$;

System.out.println$($value$)$;

$\}$

$\}$

What's the output of the program above?

Group of answer choices

$25$

None of these. It produces a compile error

$0$