Has to be in apa format and each question must be 200 words, including references from 3 different macroeconomic books, one being Macroeconomics 11th ed by William a. mceachern. including a separate p

Has to be in apa format and each question must be 200 words, including references from 3 different macroeconomic books, one being Macroeconomics 11th ed by William a. mceachern. including a separate page for the references.

- Explain why the marginal cost of production must increased if the marginal product of the marginal resource is decreasing.

- Define productivity efficiency and allocative efficiency.  What conditions must be met in order to achieve them?