What is the output of this Java program?

class Driver $\{$

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

int $a=$ foo$(4)$;

int $b\frac{?}{b}=ar(3)$

$\}$

static int foo$($int a$)\{$

$a\frac{?}{b}=ar(a+4)$

System.out.print$($a$)$;

$\}$

return $a$;

static int bar$($int a$)\{$

System.out.print$($a$)$;

return a $-1$;

$\}$

$\}$