Fishing versus Boat Building. Half the members of a fishing tribe catch 2 fish per day and half catch 8 fish per day. A group of 10 members could build a boat for another tribe in 1 day and receive a payment of 45 fish for the boat. a. Suppose the boat builders are drawn at random from the tribe. From the tribe's perspective, what is the expected cost of building the boat? nothing fish. (Enter your response as an integer.) b. Now supposing that members are selected based on opportunity cost, the minimum cost that the boat could be built for is nothing fish. (Enter your response as an integer.)