This sounds like a homework assignment. It might not be, but it sounds like one. "3. Questions asking for homework help must include a summary of the work you've done so far to solve the problem, and a description of the difficulty you are having solving it.". The current state of your question doesn't fulfill these requirements. Please edit the question to improve it. Please, also read this Open letter to students with homework problems. — Makyen ♦ 44 secs ago

This sounds like a homework assignment. It might not be, but it sounds like one. "3. Questions asking for homework help must include a summary of the work you've done so far to solve the problem, and a description of the difficulty you are having solving it.". The current state of your question doesn't fulfill these requirements. Please edit the question to improve it. Please, also read this Open letter to students with homework problems. — Makyen ♦ 45 secs ago