In the third order Taylor expansion of u=x^0.83*y^(1-0.83) around (x,y)=(1,1), what is the coefficient of (x-1)*(y-1)^2? Write the answer as a number in decimal notation with at least two digits after the decimal point. No fractions, spaces or other symbols. Here, ^ denotes power, * multiplication, / division, + addition, - subtraction.

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