Consider the surface x² + 2y² − 2z² = −30. - Find an equation for the tangent plane to the surface at point (0, 7, 8). Tangent plane is 7y-8z+15=0 Find a vector equation for the line through point (0, 7, 8) which is normal to the surface at (0, 7, 8). r(t) = with [infinity] < t <[infinity]