A compound microscope is assembled with an objective of focal length 0.40cm and an eyepiece of focal length 2.0cm. The distance between the objective focal plane and the eyepiece focal plane is adjusted to 18cm. The final image is formed at infinity.
(i) Calculate the linear magnification produced by the objective.
(ii) Determine the angular magnification produced by the eyepiece for a normal eye.
(iii) Hence find the overall magnifying power of the microscope.