Nobel laureate Paul Samuelson said that comparative advantage is one of the few ideas in economics that is both \"true and not Eobvious.\" Since it's not obvious, we should practice with it a bit. In each of the cases, determine the opportunity cost of each =worker. Who has the absolute advantage at each task, and who has the comparative advantage? Kara can build two glass sculptures per day or she can design two full-page newspaper advertisements per day. Sara can build one glass sculpture per day or design four full-page newspaper ads per day. Kara's opportunity cost of two sculptures is . Kara's opportunity cost of two ads is . Sara's opportunity cost of a sculpture is . Sara's opportunity cost of four newspaper ads is has absolute advantage in sculpting. has absolute advantage in designing ads. has comparative advantage in sculpting. has comparative advantage in designing ads