a) The two Keck telescopes have individually 10 m diameter primary mirrors and are separated from each other by 80 m. a 1) What angular resolution (in arcsec) can you archive with each individual telescope when observing at a wavelength of 450 nm (blue)? a2) What angular resolution (in arcsec) can you archive when using both telescopes as an interferometer with their baseline of 80 m observing in the infrared at 2.2μm ? a3) How far apart do two object on the moon need to be so that in case (b) we could distinguish them? b) Assuming you work with on of our telescopes on the astronomy terrace. Let's assume they have a focal length of 2000 mm and an aperture of around 250 mm. b1) What will be your angular field of view in x and y if you use the main objective to create an image on a CCD detector that has a sensitive area of 9 mm×16 mm ? b2) What would be the angular field of view if your camera sensor is an APS-C sensor?