Refer to the Newsela article, "Doctoral Student Played a Big Part in First Black Hole Photo." How was the image of the black hole created?

1.Scientists used the black hole's size and density to create an image of what it might look like.
2.Researchers used information about similar objects in space.
3, Scientists invented a telescope that takes pictures from space.
4. Researchers developed an algorithm that combined many pieces of data into one image.