Question 18 2 pts Producer surplus is the difference between the O price of the good and the marginal cost of producing it. O marginal benefit of the good and its marginal. O marginal benefit of the good and its price. O marginal cost of the good and the opportunity cost of producing it. Question 19 2 pts A minimum wage law in a competitive labor market O creates a shortage of labor. O causes equality between the quantity of labor supplied and the quantity demanded. creates a surplus of labor. O lowers the wage rate paid to workers.An income tax Shifts the labor ____ curve _ (i) demand; rightward O demand; leftward O supply; rightward 0 supply; leftward