Lab 2a

I have been trying multiple times to change the field names in my fields & relationships to be visible. I have attempted editing each individual field name as well as using the set field level security function to manually set each name as visible, but neither are working. I have graded it after attempting both fix, and yet the error still appears in Max lab grader. The help forums have not helped in changing the visibility or the name of these field names and I am unsure what to do now. At the end of my field names, they also all end in _c which doesn't seem right. This issue is affecting my ability to not have unmapped fields in Lab 2b and is also messing a lot of other things up.