Sketch a contour map of the function. f(x, y) = x² +9y² y Q Sketch the graph of the function and compare it to the contour map. (If an answer does not exist, enter DNE. Select Update Graph to see your response plotted on the screen. Select the Submit button to grade your response.) (Write an equation for the cross section at z = 2 using x and y.) (Write an equation for the cross section at z = 4 using x and y.) (Write an equation for the cross section at z = 9 using x and y.) (Write an equation for the cross section at y = 0 using x and z.) (Write an equation for the cross section at x = 0 using y and z.) Q

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