The tangent plane and the normal line of the surface y = x² + z – 6 at the point (2, -1, 1) have the equations - O a) None of these O b) 4x – y + 2z = -11 and (x, y, z) = (2, –1, 1) + t(2, –1,1) | c) 4.x + y+ 2z = 9 and (x, y, z) = (2,-1, 1) + t(4, 1, 2) O d) 4x – y+ 2z = 11 and (x, y, z) = (2, –1, 1) + t(4, –1, 2) -

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