Yan and Lin work at the dining halls of two universities. For breakfast, they make dumplings and steamed buns. It takes Yan 1 minute to make a dumpling and 2 minutes to make a steamed bun. Lin needs 2 minutes to make a dumpling and 1 minute to make a steamed bun. They each work 5 hours per day. a) Construct a table to show Yan and Lin's daily production possibilities. Who has an absolute advantage in making dumplings and steamed buns? (4 Marks) b) Construct a table to present Yan and Lin's opportunity costs of making a dumpling and steamed bun. Who has a comparative advantage in making dumplings and steamed buns