\begin{aligned} & \text{^^20(d)^^20}(5\text{^^20pts)^^20Say^^20}f(x,y)\text{^^20is^^20a^^20real^^2dvalued^^20function^^20of^^20}x\text{^^20and^^20}y.\text{^^20Which^^20is^^20greater^^20than^^20or^^20equal^^20} \\ & \text{^^20to^^20between^^20}\min _x\max _yf(x,y)\text{^^20and^^20}\max ^{}_x\min _yf(x,y)?\end{aligned}