based on the codes you shared here and DM, you seem to have totally edited part of section of codes and instructions you werent suppose to.
I am sharing screenshot of the grade function UNQ_C4 without codes. Notice the codes needs to written only by replacing the Nones and without removing the code markers ###START AND END CODE HERE###
when you edit this section beyond, you are increasing your chance to fail on the autograder, avoid doing this. Get a fresh copy and re-do assignment by only replacing the None with your codes between the code markers.
Here is a link on how to get a fresh copy of assignment, use 1a. point in the (pinned link)[Math for Machine Learning FAQ]
Let me know after you do these, if you still fail, then by personal DM, share screenshot of your code corrections.
Also don’t worry about the deadline, you can always extend the deadline depending on the type of subscription you have.
Regards
DP