Ann takes 16 minutes to make a pizza and 9 minutes to make a burger. Bob takes 19 minutes to make a pizza and 31 minutes to make a burger.

a - if Ann has both an absolute advantage and a comparative advantage in pizza-making.

b - if Ann has an absolute advantage in pizza-making. She does not have a comparative advantage in pizza-making.

c- if Ann does not have an absolute advantage in pizza-making. She has a comparative advantage in pizza-making.

d - Ann does not have an absolute advantage in pizza-making. She does not have a comparative advantage in pizza-making, either.

Note: If Ann and Bob are equally good according to the definition of an advantage, we say that they both have this advantage.