Answer:
Country A can produce 6 automobiles or 12 movies:
Opportunity cost of producing 1 automobile = 12 ÷ 6
= 2 movies
Opportunity cost of producing 1 movie = 6 ÷ 12
= 0.5 automobiles
Country B can produce 5 automobiles or 8 movies:
Opportunity cost of producing 1 automobile = 8 ÷ 5
= 1.6 movies
Opportunity cost of producing 1 movie = 5 ÷ 8
= 0.625 automobiles
Since,
Country A has a comparative advantage in producing movies. Country A has a lower opportunity cost in producing movies than country B, so, country A is producing movies.
Country B has a comparative advantage in producing automobiles. Country B has a lower opportunity cost in producing automobile than country A, so, country B is producing automobiles.
The range of relative prices:
For Country A: Movies
0.5 < P < 0.625
For Country B: Automobiles
1.6 < P < 2