Who is that?

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Across
  1. 5. In 2024, he admitted there were ... users on his social media
  2. 6. The month Facebook launched in 2004
  3. 7. The name for person who has billions of dollars
  4. 9. The name of an event hosted by Facebook in 2010
Down
  1. 1. The last name of that person
  2. 2. Facebook was inspired by photo ... books which existed in schools
  3. 3. He is the ... of META
  4. 4. The name of the social media he created
  5. 8. His salary (in dollar) as Facebook CEO in 2016