Accounting task

Imagine three countries produce cars and computers. Country A can produce 500,000 cars per month or 1 million computers per month. Country B can produce 300,000 cars per month or 2 million computers per month. Country C can produce 200,000 cars per month or 1.5 million computers per month. What is the opportunity cost of production of cars and computers for each country?

Suppose three countries produce wheat and rice. Country X can produce 800,000 tons of wheat per month or 400,000 tons of rice per month. Country Y can produce 600,000 tons of wheat per month or 300,000 tons of rice per month. Country Z can produce 400,000 tons of wheat per month or 200,000 tons of rice per month. What is the opportunity cost of production of wheat and rice for each country?