The ceiling of a lobby is shaped like a semi-ellipse. The lobby is 10m wide and in the center its height is 9m. It is also known that the height of the side walls is 6m. Tick the alternative that corresponds to the height of the lobby at 2m from each wall. Choose the correct alternative: a. 42/5 b. 5−√2/45 c. 24/5 d. 227/45 e. 27/5

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