Answer:
a. Which country has the absolute advantage in producing dates?
Mali
b. Which country has the absolute advantage in producing grain?
None
c. Which country has the competitive advantage in producing dates?
Mali
d. Which country has the comparative advantage in producing grain?
Ireland
Explanation:
Opportunity cost of producing dates:
Ireland = 10 / 5 = 2 tons of grains
Mali = 10 / 25 = 0.4 tons of grains
Opportunity cost of producing grains:
Ireland = 5 / 10 = 0.5 tons of dates
Mali = 25 / 10 = 2.5 tons of dates