700 600 Kathy is attending school in Philadelphia. Each year she returns home to visit her family and friends in New York City. Kathy's annual demand curve for train tickets from Philadelphia to New York is provided in the accompanying graph. 500 400 Price (per round-trip) 300 a. First, determine how much benefit Kathy receives from each trip home. 200 100 Demand Kathy receives $ 500 of marginal benefit from the first trip. 0 0.0 6.0 1.0 2.0 3.0 40 5.0 Quantity (number of round-trip tickets) 70 Kathy receives $ 400 of marginal benefit from the second trip. Kathy receives $ 300 of marginal benefit from the third trip. Kathy receives $ 200 of marginal benefit from the fourth trip. Kathy receives $ 100 of marginal benefit from the fifth trip.​