No. 1: Farmer Greene faces diminishing marginal product. If she plants no seeds on her farm, she gets no harvest. If she plants 1 bag of seeds, she gets 3 bushels of wheat. If she plants 2 bags, she gets 5 bushels. If she plants 3 bags, she gets (choose one): a. 6 bushels. b. 7 bushels. c. 8 bushels d. 9 bushels. Please explain your thinking.