Question 40 (3 points)
Paddy and Mick are the only two inhabitants of a small island off the coast of Ireland.
They burn coal to keep their houses warm at night. However, this coal burning is
harming the air quality on their island. Both Paddy and Mick could install air filters on
their chimneys. These filters cost 50 each. Each filter provides a social benefit of 80,
but those benefits are divided equally among Paddy and Mick. If both Paddy and