For questions 3-5, please refer to the chart below: Output Cost Marginal Cost Revenue Marginal Revenue O $100 $150 $50 $210 $60 OI A CONN $280 $70 $360 $80 $450 $90 3. If the market price for a unit of output is $100, the marginal revenue of increasing output from two to three units is: a. $450. b. $300. c. $210. d. $100. 4. The marginal cost of increasing output from three units to four units is: a. $50. b. $80. $360. d. $280. 5. The revenue for producing five units is (if the market price is $100): a. $400. b. $500. C. $75. d. $50