The surface z? = x² + y? – 4x + 5 remains unchanged when rotated about the line L in R Which of the following could be parametric equations for L? x = -2, y = 0, z = t Ох%3D 2, у %3 0, z%3D t x = -2t, y = 0, z = 1 x = 2t, y = 0, z = 1

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