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The temperature T in a square region of the (x, y) plane is given by the formula T(x,y) = By3 x+ 11, x,y 5 (2,2). An ant inside the square region is initially at the point (1, %)~ What is the equation of the curve the ant should move along in order to ensure that the temperature it experiences decreases as rapidly as possible? Express your answer in the form f(x)