A +6.00 D lens, having an aperture equal to one-twelfth of its focal length (f /12) is correctly focused on a very distant object. Assuming the image to be well defined when images of points do not exceed 0.1mm in diameter, find the position of thenearest object that would have its image apparently well defined in the focal plane. What is the depth of focus of the lens for the same image criterion?Answer should be 23.15m and a depth of focus of 2.4 mm