Compute the focal ratio (stated as f/xxx), the plate scale (in arc seconds/mm), and the linear...

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Compute the focal ratio (stated as "f/xxx"), the plate scale (in arc seconds/mm), and the linear separation of Alcor and Mizar on the image of this pair formed at the Coudé focus of the 82-inch telescope at McDonald Observatory. The primary mirror has a diameter of 2.08m and the focal length for this set-up is 47.70m. Alcor and Mizar are separated in the sky by an angle of 0.20°. Compute the focal ratio (stated as "f/xxx"), the plate scale (in arc seconds/mm), and the linear separation of Alcor and Mizar on the image of this pair formed at the Coudé focus of the 82-inch telescope at McDonald Observatory. The primary mirror has a diameter of 2.08m and the focal length for this set-up is 47.70m. Alcor and Mizar are separated in the sky by an angle of 0.20°.