Your answer will be I
Because Frankie is coming over to watch a movie with Sadie and me. Just doesn't work. However, Frankie is coming over to watch a movie with Sadie and I. Does work because you're talking about yourself and you're talking about another person.
So that's your answer.
I hope it helped! :)
Write dialogue with the character and another character
Answer:
the importance of solving the problem a clear solution to the problem
Explanation: