A compound microscope has a barrel of length 163 mm. The focal lengths of the objective and the eyepiece are 4.01 mm and 27.1 mm, respectively. Using the assumption that the barrel length is much bigger than either focal length, approximate the total angular magnification M of the microscope for a person whose near point is 25.0 cm away. M Is the image seen in the microscope upright or inverted? inverted upright