I'm not sure if I am doing this correctly please help. Please show the formulas and any calculations that you do I'm really confused. Thank you so much I really appreciate it!

Consider the following table, which shows unspecialized productive capabilities of sets workers in Canada and US: Product Canada Output US Output (Tons) (Tons) Wheat 120 200 Corn 60 150 1. What is opportunity cost of a ton of Wheat in Canada? (1 points) 2. What is opportunity cost of a ton of wheat in the US? (1 points) 3. Which country has comparative advantage in production of wheat? How do you know? Explain your answer. (2 points) 4. Canada should import and export . (2 points)