b, on the other hand, would prefer to clean up these first two units, incur those costs as opposed to paying $1500 to avoid cleaning them up, so b is going to want to buy, three pollution rights. c is going to want to buy none of, none of the pollution rights, and the reason is that it's cost of clean up is, is lower for each of these units, than the $1,500 ticket price, so c is going to have zero tickets, quantity demanded.