where C is the ellipse 36x + 4y = 4, oriented clockwise. 4. Consider the saddle surface r = y - z², find the equation for the tangent plane at the point (0,1, -1). 5. Consider the saddle surface r y?-...

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Extracted text: where C is the ellipse 36x + 4y = 4, oriented clockwise. 4. Consider the saddle surface r = y - z², find the equation for the tangent plane at the point (0,1, -1). 5. Consider the saddle surface r y?- z², find the point where the tangent plane is parallel to r+y+z 1.