Attainable, but the economy is inefficient.
A point inside a production possibilities curve represents things that can be produced. However, points inside the curve would be less efficient to produce than those points resting directly on the line.
At any point of underutilization/any point inside of the curve
It would not shift the curve; it would be represented by moving from a point inside the curve toward the curve.
Any point on the PPC curve
A point that lies outside a country's production possibilities curve means that the country is not able to produce. The possibility curve shows how a country can efficiently produce.
A point inside a production possibilities curve represents things that can be produced. However, points inside the curve would be less efficient to produce than those points resting directly on the line.
At any point of underutilization/any point inside of the curve
It would not shift the curve; it would be represented by moving from a point inside the curve toward the curve.
Any point on the PPC curve
A point that lies outside a country's production possibilities curve means that the country is not able to produce. The possibility curve shows how a country can efficiently produce.
It indicates that more output could be produced with available resources in that region.
Operating at an inefficient point, i.e. inside the PPF and not on the edge or line of the PPF
an efficient utilization of resources
Full employment exists at every point on the production possibility curve. Which can be indicated with Y(f).
Attainable.
below or to the left of the production possibilities frontier
A point outside a PPC shows the problem of scarcity. A point outside the Production Possibility Curve shows a combination that cannot be attained because sufficient quantity of resources are not available to produce them.