Let $$f(x) = \frac { x^2 + 6 x + 8 } { 3 x + 6 }$$


(a) $f'( 3 ) =$


(b) $f''( 3 ) =$

[NOTE: There are two ways to do this problem. The first is the quotient rule. The second is much easier and does not use the quotient rule.]