The temperature at a point (x, y) is T(x, y), measured in degrees Celsius. A bug crawls so that its position after t seconds is given by the following function, where x and y are measured in centimeters. 1 = V5+t,y = 1+ x = t 20 The temperature function satisfies T(5, 2) = 4 and Ty(5, 2) = 5. How fast is the temperature rising on the bug's path after 20 seconds?

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