Questions for Amazon's 10k dec 2021

1. Did Amazon recognize any impairment loss for Goodwill or Indefinite-Lived Intangible Assets during 2020? Include what the footnote stated about the recognition (or lack of recognition)
2. How often does Amazon perform an impairment test for Goodwill?
3. Did Amazon mention the process they use to estimate possible impairments for Long-Lived Assets; if any include what the footnote stated about the process?
4. What causes the need for an asset impairment review for Long-Lived Assets?
5. Why would the requirement and the timing of the possible test/review process not be the same for Goodwill or Indefinite-Lived Intangible Assets and Tangible Long-Lived Assets?