(t >) The figure below depicts a contour map for a function f(x, y), with each level curve labeled with the value of f on that curve. Determine the signs of all first and second partial derivatives of f at the point P by filling in the blanks below with either "<" or ">." You may assume that the signs of all first and second partial derivatives of f do not change at any point in the domain of f. (a) f(P) > 0 (b) f(P) <0 (c) fxx (P) > 0 1 3 4 Р 5 6 > (d) fay(P) <0 (e) fyx (P)<_0 (f) f (P) > 0 8