Answer:
According to Ronald Coase, in his Coase theorem efficiency in the areas of negative externalities can be achieved through negotiations aimed at reaching conclusions that is places each party in a win-win position.
The minimum the spa would pay the surfboard designer is $175 and the maximum is $250.
Step-by-step explanation:
Assuming the conclusion reached in the negotiation is for the surfboard designer decides to install the technology that eliminates noise,the spa would have to pay $175 while on other hand ,if agreed between both parties that the surfboard designer shifts to next door ,the spa would cough out $250,the increase cost of renting in the next building.