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The following information is available about the labour market in Gigonia: Real wage (per hour) Demand for labour Will accept a job Labour force 9 550, 000 410, 000 500, 000 10 520, 000 450, 000 520, 000 11 490, 000 490, 000 540, 000 12 460, 000 530, 000 560, 000 13 430, 000 570, 000 580, 000 Assume that, unless told othenrvise, the real wage is flexible. (a) State the number of voluntary unemployed at the equilibrium wage rate. (b) State the level of involuntary unemployment if the wage rate is rigid at 1 per hour above the equilibrium wage. (c) Explain the reason why the gap between the number who will accept a job and the labour force narrows as the wage rate rises. (d) Explain how an increase in the real wage from 9 per hour to 13 per hour might encourage workers to work longer hours or shorter hours