2. Suppose the tangent plane to the surface w = g(x, y, z) is horizontal at (x, y, z) = (0, 1, 27). Also assume at that point, gr,-3, guyã¼3, gz,--1, gxy = 1, gnzã¼0 , gyz-0, and all second partial derivatives are continuous. Determine if it is a local maximum, a local minimum or a saddle point.