Consider the line $L(t) = \left<3-3t,5+t,-3t\right>$. Then:

	$L$ is		? parallel perpendicular neither to the plane $18y+6z = -54$
	$L$ is		? parallel perpendicular neither to the plane $5x+6y-3z = -7$
	$L$ is		? parallel perpendicular neither to the plane $6x-2y+6z = 8$
	$L$ is		? parallel perpendicular neither to the plane $x+y+4z = -21$