Questiоn is bаsed оn the chаrt belоw for а firm that is perfectly competitive in both the labor and product markets, showing how much daily output a firm can produce using different numbers of workers. Table: Perfectly Competitive Firm Number of Workers Output 1 3 2 9 3 16 4 21 5 23 6 24 If output sells for $20 per unit, what is the marginal revenue product of the fifth worker?