Summary On Relevant Vs. Irrelevant Costs for decision making; Misc decision making issues

I’m trying to learn for my Accounting class and I’m stuck. Can you help?

please watch the three videos below and write a three to four paragraphs summarizing the contents of the videos. the paragraphs do not have to correlate with each other nor need to be in a specif format, just summarize what the videos are saying. Thank you.

https://www.youtube.com/watch?v=z1n2bX_VkuM

https://www.youtube.com/watch?v=Rap9zd6JT0A

https://www.youtube.com/watch?v=jf9GmiWLWBE&list=PLxP0KZzCGFYP0KHkWvqCF03vAQKygcLFc