(Figure: Labor Market) Refer to the labor market shown here. Suppose a minimum wage of $18 per hour is introduced. After the implementation of the minimum wage, the number of workers hired Wage ($ per hour) Supply $20 $18 $15 $12 Demand 20,000 24,000 30,000 36,000 40,000 Quantity of labor O falls by 12,000 O falls by 6,000 O rises by 6,000 O rises by 10,000