9. (Industrial Unions) Review the logic underlying the exhibit below. Then determine the effect, on the industry and a typical firm, of an increase in the demand for industry output. Show your conclusions on a graph. Does the mag- nitude of the increase in demand make a difference? Effects of Labor Union's Wage Floor (a) Industry (b) Firm W W Wage rate Wage rate W W d = Marginal revenue product E' E E" Labor per period 0 Labor per period