Go to the following URL https://www.washingtonpost.com/technology/2020/07/29/app

Go to the following URL https://www.washingtonpost.com/technology/2020/07/29/apple-google-facebook-amazon-congress-hearing/
and learn about the recent Congressional hearings held where Amazon, Apple, Facebook and Google testified before Congress.
Are these cases of monopoly or oligopoly power? Why or why not?
Should the government be doing something to limit the market power of these firms?
What do you think should be taken into consideration to decide if action should be taken?
If you believe something should be done, what sort of remedies do you think would be appropriate? If you don’t think anything should be done, what harm do you think would result from government intervention?
Are there examples of network effects at play with the way that these companies operate? What evidence do you have of that?
Are consumers benefiting from these firms, or being harmed?

Please cite another source about the Congressional hearings.