Answer to Moving Windows section of the "Calculations with Vectors and Matrices" online course is identical to solution but marked wrong. How to get credit?

I'm taking the "Calculations with Vectors and Matrices" self-paced online course, but I'm not getting due credit for the section on Moving WIndow Calculations. I have screenshots to prove that even an answer that is identical to the one under "See solution" (which I reached indenpendently) is marked as wrong, saying I haven't added minUsage and maxUsage to the plot. I've tried many different ways of recalculating, reformatting, and resubmitting Task 4, including eliminating the section break between the problem setup and Task 1 because I suspected that the duplication of the original plot from the setup to Task 1 might be part of the issue, but even that didn't fix it. At this point, the only way I can get full credit for the course is if someone on the admin side can override the spurious error.

Answer 1

[Cris LaPierre]

First, I will admit this is a bug that needs to be fixed. I'll report it to the appropriate team.

If you look closely, you will see that your answer is not exactly the same as the reference solution. You are plotting the lines in task 4 in the reverse order of the reference solution.

The workaround until the fix is added is to plot maxUsage first, then plot minUsage.

[Rebecca]

I'm kind of amazed reordering it worked after everything else I tried. Anyway, thank you!