Good Morning!
I did all the steps from Part 2 and when I got to Step 86, I saved it. Salesforce gave me an error message saying I was not authorized to save. It took me back tp the home page and when I followed steps 71-77 again, it does not let me edit.

That sounds like a browser/Wifi glitch to me. I would try logging out, closing your browser, re-opening and logging back in again. (When there's a glitch in the Wifi data being communicated back and forth between your laptop and Salesforce, it can break the security/privacy protocol and then it looks to SF like you're no longer having a secure "conversation.")
Anyway, try that and let me know. If that doesn't help then do these 3 steps so I can access your account and take a look:
Log in and click on the character icon (upper right) and click My Settings
Click My Personal Information (upper left) and then Grant Account Login Access below that
On the row for The Max Labs Project Support, use the --No Access-- pull-down menu to select 1 month and click Save
Let me know when you've done them, ok?
I tried and it still does not let me edit. I also gave you access to my account but for me it says "Your Company's Administrator"
No, I can't access it that way. I'm not your company's administrator. You have to use the Max Labs Support line. Here's a pic:
Wait are you logged in as Riley instead of yourself by any chance?
Yes, I was logged in as Riley. I just gave you access from my normal account. Is there a way to delete what is on there and start from step 71?
Hi!
I just wanted to le you know that I was able to complete the assignment after I signed back into my account.
Thank you for all your help.
Oh, awesome! Thanks for letting me know. I'm glad it worked out. I hope 3b goes smooth for. you. :)