Three Dimensional Geometry Part 4

Let a line L passing through the point P(1,1,1) be perpendicular to the lines ‌

x−4

4

=‌

y−1

1

=‌

z−1

1

and ‌

x−17

1

=‌

y−71

1

=‌

z

0

. Let the line L intersect the yz - plane at the point Q . Another line parallel to L and passing through the point S(1,0,−1) intersects the yz-plane at the point R . Then the square of the area of the parallelogram PQRS is equal to ____ .