Let z = g(x, y) = f(3 cos(ry), y + e) provided that f(3, 5) = 8, f1(3, 5) = 2, f2(3, 5) = 3. %3D i) Find g1 (0, 4). ii) Find g2 (0, 4). iii) Find the equation of the tangent plane to the surface z = f(3 cos(ry), y + e=") at the point (0, 4).

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