Suppose that in Providence, Rhode Island, the cost of operating a fishing boat is $4000 per month. Suppose that if y fishing boats operate in the bay, the total monthly revenue from fishing boats in the bay is $2000(20y - y?). (a) If the number of boats that operate in the bay is regulated to maximize total profits, how many boats will operate in the bay? (b) If there are no restrictions on how many boats can use the bay, how many will? What is the externality in this situation, and is it positive or negative