Use technology to answer parts (a) through (d) about the function f(x,y)=x+y-10xy for -1.5≤x≤1.5 and -2.25 ≤ y ≤2.25. .Plot some level curves in the given rectangle. b. Calculate the function's first partial derivatives and find the critical points. How do the critical points relate to the level curves plotted in part (a)? Which critical points, if any, appear to give a saddle point? Give reas . Calculate the function's second partial derivatives and find the discriminant ffy-fy d. Using the max-min tests, classify the critical points found in part (b). Are your findings consistent with your reasons in part (b)?

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