While selecting MLS sources, one needs to select supervised learning for that category.
Now coming to your error, check implementation is perceived as although you codes are correct, the grader is looking for to write codes in the way it has been programmed for auto-grading and that is where your implementation is not matching with the grader submission.
To check or address this issue, kindly go back to the UNQ-C1 and C2, see if you have not hard-coded any of the codes.
If unable to get, kindly DM codes for UNQ-C1 and C2 via personal DM. Click on my name and then message. It great that you didn’t share your codes on public post thread as it is against community guidelines.
First of all you have edited the grader cell by removing ##START AND END CODE HERE###. ONE NEEDS TO ONLY EDIT OR WRITE THE CODE BETWEEN THESE TWO ##HASHTAGS.
THE TOTAL COST CODE WRITTEN BY YOU AT THE END IS INSIDE THE FOR LOOP WHICH IS A MISTAKE, MENTION TOTAL COST AS cost_sum/(2m)(for my assignment I didn’t implement cost sum separately as I didn’t change any of the given codes by the grader at the beginning of the assignment, so my total cost was cost/(2m). In case you are using cost_sum = cost_sum + cost, that again needs to be outside the for loop.
I am sharing my grader cell when a new assignment is opened how it looked. Check or compare the placement of codes especially for total cost at the end.
Kindly if you have edited the grader cell, I would suggest to re-do the assignment with a fresh copy.