Answer:
Just 3
Explanation:
I believe the other two are incorrect
They believe the distortions happened when two galaxies collided.
Hope This Helps :)
For any electromagnetic wave, the relationship between frequency and wavelength is given by

where

is the wavelength
c is the speed of light (the speed of the electromagnetic wave)
f is the frequency
For the X-rays in our problem, the frequency is

, while the speed of light is

, so the wavelength of this radiation is