Question 10 (4 points)
Find an equation of the tangent plane to the given surface at the specified point.
$z = 2x \sin(xy - 1)$, at point $(1, 1, 0)$
$2x - 2y - z + 4 = 0$
$2x + 2y - z - 4 = 0$
$x = 1 + 2t, \ y = 1 + 2t, \ z = -t$
$x = 2 + t, \ y = 2 + t, \ z = -1$