Problem 2. (1 point) Consider the contour diagram for z = f(x, y) shown below. Note: you can click on the graph for a larger view. Determine whether the following values related to f(x, y) at the point P are positive, negative, or zero. f(x, y): Positive fx(x, y): Positive fy(x, y): Positive fxx(x, y): Positive fyy(x, y): Positive fxy(x, y): Positive