I'm writing a sentence, and I'm not sure if it's grammatically correct.
Here are my partner, Jane Doe, and I's completed assignment.
Would this be alright? I never know how to properly use possessives when I'm including myself and someone else.
Also, in case you didn't see my comment below, I need to include my partner's name. It can't just be "me and my partner's completed assignment". Otherwise, I wouldn't have an issue.