Find the values of x, y and z that correspond to the critical point of the function: z = f(x, y) = 4x² - 8x + 1y+ 5y² + 9xy Enter your answer as a decimal number, or a calculation (like 22/7) (Round to 4 decimal places) I= S Y (Round to 4 decimal places) (Round to 4 decimal places)

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