Match each function with its contour plot. Click $on$ a graph $to$ make $it$ larger. Darker areas represent

lower elevations and lighter areas represent higher elevations.

$(i)1.f(x,y)=3-\sqrt[\phantom{2}]{x^2+y^2}$

$f(x,y)=cos(\frac{x^2+y^2}{4})$

$A$

$f(x,y)=\frac{1}{1+x^2+y^2}$

$f(x,y)=3-x^2-y^2$

$A$

$c$

$B$

$D$