A contour diagram for the smooth function $z=f(x,y)is$ shown below, where all the contours are unevenly spaced lines $at$ specified levels. Figure $1.$ Figure for Problem $4.$ Determine the sign $of$ each partial derivative $atPby$ circling your answer. $fx(P)$: $+-0,fy(P)$: $+-0,fxx(P)$: $+-0,fyy(P)$: $+-0,fxy(P)$: $+-0$ Figure $1.$ Figure for Problem $4.$

A contour diagram for the smooth function $z=f(x,y)is$ shown below, where all the contours are unevenly spaced lines $at$ specified levels.

Figure $1.$ Figure for Problem $4.$

Determine the sign $of$ each partial derivative $atPby$ circling your answer.

$f_x(P)$:$,+,-,0,f_y(P)$:$,+,-,0$

$f_{}(P)$:$,+,-,0,f_{yy}(P)$:$,+,-,0$

$f_{xy}(P)$:$,+,-,0,$