Left panels: images of (a) λ = 3 mm brightness temperature, (c) visible continuum intensity, (e) line-of-sight magnetic field, and (g) 1330 Å convolved to the ALMA beam size. Right panels: histograms from the images of (b) brightness temperature at λ = 3 mm, (d) visible continuum emission, (f) strength of the line-of-sight magnetic field, and (h) 1330 Å, derived from different umbral regions. The ellipses in the left panels outline regions over which the histograms in the right panels were made. Green histograms: the whole umbra, within green contours; red histogram: the inner umbra, within a red ellipse; and blue histogram: the outer umbra, between the blue ellipse and green contour. In the top panel the asterisks and error bars indicate average values and their standard deviations for each region, respectively.