The temperature at a point (x,y) is T(x,y), measured in degrees Celsius

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 x=(1+t)^1/2, y=2+1/3t , where x and y are measured in centimeters. The temperature function satisfies Tx(2,3)=4