Answer:
The back of your head appear to be 16mm far away.
Explanation:
The light will go from the back of your head to the rear mirror (5.5m m). Then to the front mirror (8m m) and finally to your eyes (2.5m m).
That is, 5.5 + 8 + 2.5 = 16mm.
That's how far the image appears to be
Please find the attached file for the Image.