Three graphs titled occupation X, occupation Y, and occupation Z plot wage rate versus employment in millions.In the 3 graphs, the horizontal axis is labeled employment in millions and the vertical axis is labeled wage rate. The horizontal axis ranges from 0 to 9 in increments of 1. The vertical axis ranges from 1 to 9 dollars in increments of 1. Occupation X: The graph shows a falling line labeled D subscript x that begins at (0, 10) and ends at (9.5, 2.5). Occupation Y: The graph shows a falling line labeled D subscript Y that begins at (0, 10) and ends at (9.5, 2.5). Occupation Z: The graph shows a falling line labeled D subscript Z that begins at (0, 10) and ends at (9.5, 2.5). Assumptions: the labor force comprises 9 million men and 9 million women workers; the economy has 3 occupations, X, Y, and Z, each having identical demand curves for labor; male and female workers are homogeneous with respect to their labor-market capabilities; women are discriminated against by being excluded from occupations X and Y and are confined to Z; aside from discrimination, the economy is competitive, and workers seek to maximize their earnings. Refer