Please help me with the following questions:

1-The primary function of a PPC is to show: allocative efficiency productive efficiency and opportunity cost marginal utility circular flow the general suitability of all resources for any good or service 2' On a production possibilities curve (PPC), what does an inward shift imply? There has been an increase in technologies or resources. Government has increased its intervention in trade. Inputs and outputs have become imbalanced to the point of inefficiency. Trade has decreased to allow the market to reach maximum efficiency. A shortage of workers has decreased the output of production. 3- On a production possibilities curve (PFC), a reduction in productive capacity would signify what type of shift? A shift beyond the vertical axis A shift beyond the horizontal axis An inward shift An outward shift No shift at all 4. Country A can produce more apples than any other country when given the same quantity of factors of production. As a result, Country A must have: an absolute advantage in apple production a comparative advantage in apple production superior weather, which results in higher apple production an increasing opportunity cost associated with apple production more factors of production devoted to apple production than any other country