. The figure below shows level curves of the function f(x, y). The tangent plane approx- imation to f(x, y) at the point P = (xo, yo) is f(x, y) ≈c+m(x-xo) + n(y-yo) What are the signs of c, m, and n? Y (a) c> 0, m>0, n>0 (b) c<0, m> 0, n <0 (c) c> 0, m < 0, n > 0 (d) c < 0, m<0, n < 0 (e) c> 0, m > 0, n<0 P x

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