The point that is unattainable is Point v because it is outside the production possibilities frontier.
The Production possibilities frontier of a country shows the combinations of two goods a country can produce when all its resources are fully utilised.
The frontier is concave to its origin. The reason is as more capital goods are produced, there would be fewer resources available to produce consumption goods. As a result, less of consumption goods would be produced.
Point outside the curve are unattainable for the country. Point V is unattainable.
Point z which is inside the production possibilities frontier indicates that the country's resources are under-utilised
Points W, X, Y lies on the curve so they attainable given the country's resources.
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