A microscope has an objective lens with a focal length of 12 mm. A small object is placed 0.8 mm beyond the focal point of the objective lens.
(a) At what distance from the lens does the real image of the object form?
(b) What is the magnification of this real image?
(c) If the eyepiece with a focal length of 2.5 cm is used with a final image at infinity, what will be the overall angular magnification of the microscope?