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- Suppose that the Celsius temperature at the point (x, y, z) on the sphere x2 + y2 + z2 = 1 is T = 400xyz2. Locate the highest and lowest temperatures on the sphere.By minimizing the function ƒ(x, y, u, y) = (x - u)2 + (y - y)2 subject to the constraints y = x + 1 and u = y2, find the minimum distance in the xy-plane from the line y = x + 1 to the pa-rabola y2 = x.Suppose that the temperature in degrees Celsius at a point (x, y, z) of a solid E bounded by the coordinate planes and x + y + z = 7 is T(x, y, z) = xz + 7z + 14. Find the average temperature over the solid.