Solve the all parts of given problem:
Problem: The focal length of the eyepiece of a certain microscope is 18.0mm. The focal length of the objective is 8.00mm. The distance between objective and eyepiece is 19.7cm. The final image formed by the eyepiece is at infinity. Treat all lenses as thin.
Part a: What is the distance from the objective to the object being viewed?
Part b: What is the magnitude of the linear magnification produced by the objective?
Part c: What is the overall angular magnification of the microscope?
Please explain each step to determine the distance from the objective to the object being viewed.