4. In an economy, L; = 170 510, while L8 = 20 + 10w, where w is the hourly wage rate. (a) What is the equilibrium level of employment and wage? (b) If the present minimum wage is $7.25/hr and the government raises it to $7.50/hr, how many workers will lose their jobs? What is the unemployment rate? (0) If instead the government voted to raise the minimum wage to $12/ hr, how many workers will lose their jobs? What is the unemployment rate