Return Headers of First Three Empty Cells within a Row

--Given an array of student scores, Return each Header of First Three Empty Cells within a Row--

Hello,
I often must report to my students their next three missing assignments. Each student's learning is individualized so each missing-assignment-list is unique.

Given an array of scores where each row is a student's name and a contiguous section of columns are the assignments, I'd like to add to each student row the following: first missing score header, second missing score header and third missing score header. This could be placed on a new sheet instead of at end of row.
I will have to add the columns or sheet I am seeking frequently (or paste data to a template) because I get new data frequently.

The list of students changes weekly but the assignment columns seldom changes.
Can you help?

Hi Martin,
Thank you so much for this. Now I just have to figure out how to plug in my array ranges easily. My array size changes frequently as I download it a few times a week. What do you think?
Thanks again.