The image formed by a thin converging lens is located at a distance

from the lens that is 6.7 times the focal length f.
a)If the image is real, what is the object distance in units of the focal length f?
b)What is the magnification of this lens?
c)If the image is virtual, what is the object distance in units of the focal length f?
d) What is the magnification of this lens?

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