Explain the difference between a single incident command and a unified command

Write a post that answers the following:

1. Explain the difference between a single incident command and a unified command.2. Research the internet and find an article, video, or webpage detailing an emergency incident that has occurred in the U. S. in the last 10 years and that used a unified command.3. Post the link to the article, video, or webpage.4. Was the command structure effective for this incident? If yes, describe why. If no, what could have been done better?