Concept:The puzzle is solved by arranging all persons on floors 1 to 8 using the given conditions.Explanation:Use the clues to eliminate wrong positions and fix each person's floor.Arrange the floors from bottom to top as follows:Floor 1: ShreyaFloor 2: GauravFloor 3: ReenaFloor 4: PriyaFloor 5: TanyaFloor 6: AnkitFloor 7: NehaFloor 8: RohitCheck that this order satisfies all the given conditions.From this arrangement, the person on the fifth floor is clearly Tanya.Answer:Tanya