Name your courseroom. We'll take it from there.
A collaborative learning community: a small assigned group that produces a shared deliverable together. The grade is normally shared, which is what makes a quiet teammate expensive. Groups that post a skeleton of the deliverable in the first forty-eight hours and agree who owns which section, in writing and in the group space, have far fewer problems later.
A major piece tied to program-level outcomes rather than only to your course, so it is assessed against criteria written above your instructor and sometimes reviewed beyond them. It looks like an ordinary paper, which is exactly why students lose marks on requirements the weekly work never mentioned.
That you have to post on three separate calendar days, not that you have to write three posts. Writing everything in one Sunday sitting satisfies none of it, however good the writing is, because the requirement measures presence across the week. It is one of the easiest places in a program to lose marks quietly.
Escalate while the work is still live. Finish your own portion so it stands on its own, keep every agreement inside the course group area where the platform records a timestamp, and inform your instructor before the due date passes. Staff have considerably more room to act on a live problem than on one described after marking.
The classroom environment many GCU courses run in, where your discussions, assignments, grades and group spaces live. Knowing where the participation record and the rubric actually sit inside it saves a surprising amount of time, because both are things students end up checking weekly for the length of a course.