While we were at Yale University in Connecticut, we listened to the Whiffenpoofs, the nation’s oldest collegiate a capella group. Every Monday night, their dulcet tones light up Mory’s Temple Bar, the sound traveling in straight lines until hitting a wall. Can you figure out which rooms the Whiffenpoofs should stand in so that every room can hear at least one of the singers, but none of the singers can hear each other?
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