1. A farmer has raised his fox to protect a flock of chickens. While the fox is afraid of the chickens' large talons, no amount of training can ever completely get rid of a fox's carnivorous nature. One day, the farmer heads out on a journey, taking along the friendly fox, two chickens, and a huge sack of chicken feed. When the group gets to a river, the farmer finds only a small boat with three seats including one that the farmer must sit in-to cross the stream. The farmer pauses and considers all options: . The farmer can only row two animals across the stream at once. . The sack of feed is huge and takes up both seats in the boat. • The cowardly fox will run away forever if it is left alone with two chickens. . The fox is hungry and will eat a chicken if only the two of them are ever left alone. • The chickens are also hungry, and either one will eat the feed if they (one or both) are ever left alone. The farmer looks at the boat and lets out a long sigh. How can he safely get the whole crew-including the feed-across the river?