Consider the function f(x, y, z) = 4(x² + y²) z² and the Point A=(1,0,2) (a) find K such that the curve. A r(t) = (et cost, et sint, 2et), te [1,¹] is on the surface f (x, y, z) = K and find the unit tangent vector to r(t) At A.

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