The file HueSatLumChart contains six worksheets named a$,$ b$,$ c$,$ d$,$ e$,$ and f that each contain a pair of colored rectangles. The colors of the rectangles in each of these pairs differ on a single charac$-$teristic of color $($hue$,$ saturation, or luminance$).$ Use this file and the Colors dialog box to determine whether each pair of colors differs on hue, saturation, or luminance, and explain your answer.

$($a$)$

$($b$)$

$($c$)$

$($d$)$

$($e$)$

$($f$)$