A hobby telescope has an objective lens with a focal length of 76cm and an eyepiece with a focal length of 8.2mm. We view the planet Jupiter with this telescope. We do this at the time of year when we are closest to Jupiter. (a) Find the diameter of the image of Jupiter produced by the objective lens. (b) Find the angular size of Jupiter as viewed through the eyepieces. (c) How far should I place a marble (1-cm diameter) from my eye to obtain the same angular size as in part (b)?