A metal plate is situated in the -plane and occupies the rectangle , , where and are measured in meters. The temperature at the point in the plate is , where is measured in degrees Celsius. Temperatures at equally spaced points were measured and recorded in thetable.(a) Estimate the values of the partial derivativesand . What are the units?(b) Estimate the value of , where .Interpret your result.(c) Estimate the value of .

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