This is the YOLO assignment. You’re right that it is challenging. The concept of what YOLO is doing is several notches more complex than anything we’ve dealt with up to this point and we also need to use several new and more sophisticated TF functions than we have encountered up to this point.
But it’s not really fair just to say “please help”. Where am I supposed to start? My suggestion would be to take a few deep calming breaths or maybe go for a walk. Then come back and read through the beginning part of this notebook again carefully down to the first function. There are lots of explanations, lots of hints and lots of pointers to TF functions and their documentation.
The other thing that would be good to do is look at some of the Discourse posts about YOLO. Here’s one of several really excellent and helpful posts on the subject from Ai_Curious.
Maybe once you’ve done that, you’ll be able to formulate a more specific question than “Please help!” 