Recursive Tracing. For each call to the following method, indicate what value is returned:

public static int mystery(int n) {

if (n < 0) {

return -mystery(-n);

} else if (n == 0) {

return 0;

} else {

return mystery(n / 10) * 10 + 9 - (n % 10);

}

Call	Value Returned
mystery(0)
mystery(5)
mystery(13)
mystery(297)
mystery(-3456)

}

Can any one help me with it?