please answer

12. The owner of a catsh pond allows only 2 people to fish per day from 10 AM to 4 PM to prevent over-shing. Occasionally more than 2 people want to sh on the same day. The following table shows the list of people who wanted to fish last Tuesday; their respective times of arrival and their reservation prices that day (the maximum amount they would pay to avoid postponing fishing). Arrival Time Reservation Value Adam 10 AM $20 Bella 10:30 AM $40 Claire 1 PM $30 Donald 3 PM $60 Fishing is \"free\" and the owner operates it on a first come, first served basis. What is the dead weight loss associated with this allocation rule? (a) $0 (13) $100 ((2) $60 (d) $20 (e) $40