You have the graph below of the function z = f(x,y). Fig out whether the partial derivatives given in a and b are positive, negative or zero. *note that the function is symmetric about zero in both the x and y directions. a) f,(0,-2) and f„(0,-2) 15 10 b) f,(0,-2) and f„(0,-2) 5: -5 -10 0 -2 -4

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