Fill in the table and guess the value of the limit:
$\lim\limits_{y \to 5} f(y)$, where $f(y)= \frac {y^2 - 4 y - 5} {y^2 - 2 y - 15}$

$y$	$f(y)$	$y$	$f(y)$
5.002	$\qquad \qquad$	4.998	$\qquad \qquad$
5.001	$\qquad \qquad$	4.999	$\qquad \qquad$
5.0005	$\qquad \qquad$	4.9995	$\qquad \qquad$
5.0001	$\qquad \qquad$	4.9999	$\qquad \qquad$

The limit as $y \to 5$ is