(Solved): Contour A Conlout Bf(x,y), Contour C The figure below shows contours of f(x,y) with values of f on ...

Contour A Conlout $Bf(x,y)$, Contour C The figure below shows contours of $f(x,y)$ with values of $f$ on the contours purposely omitted! If $f_x(P)>0$, then determine, if possible, the sign of the following: (a) $f_y(P)$ (b) $f_y(Q)$ (c) $f_x(Q)$ Briefly explain your reasoning for selecting the signs above or explain why the signs can not be determined. Hint: Try to utilize labeled contours $A,B$, and $C$.