What is the output of this Java program?

class Driver $\{$

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

int $a\frac{?}{b}=ar(1)$;

int $b=f$@$o(a)$;

$\}$

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

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

$a\frac{?}{b}=ar(a-2)$;

return $a$;

$\}$

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

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

return a $+3$ ;

$\}$

$\}$