20 U 18 16 14 12 10 ONADO 8 10 12 14 16 18 20E. (Notes upload) Depict these gain areas by shading them in on a graph. Relative to when the firm goes first, the gains are 1 when the union goes rst. (Enter "1" for higher, \"0" for the same, "-1\" for lower.) The magnitude of the difference between firm and union gains is 1 when the union goes first. (Enter "1" for higher, "0" for the same, "-1" for lower.)