Please help
David and Ella are planning a holiday together to Hawaii. David says that he can only enjoy a day of sightseeing if it is followed by a day on the beach, and he can only enjoy a day on the beach if it follows a day of sightseeing. Ella says that one day of sightseeing is equally good to one day on the beach. The price of one day of sightseeing is €20 and the price of one day on the beach is €10. Their joint budget is €240.
a. If they end up choosing to spend 7 days of sightseeing and 10 days on the beach, does there exist another bundle that makes both better off?
b. If they end up choosing 9 days of sightseeing and 6 days on the beach, does there exist another bundle that makes both better off?
c. Suppose that Ella replaced David with Freddi. Freddi says that one day of sightseeing is equally good to four days on the beach. Answer parts c. and d. for Ella and Freddi.
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