public class

public int $w=3,x=4$;

public int product$()\{$

$\}$

$\}$

return $w^{**}x$;

public class B extends A$\{$

public int $y=2$;

public int product$()\{$

$\}$

return $w^{**}{x}^{**}y$;

$\}$

public class $C$ extends $B\{$

public int $z=3$;

private int $v=2$;

public int productZero$()\{$

$\}$

return $w^{**}{x}^{**}{z}^{**}y$

public int productone$($