Which of these sentences is written correctly?
1) Helenas favorite song is you are my sunshine and she hums it when she's happy.
2) Helena's favorite song is "you are my sunshine," and she hums it when she's happy
3) Helenas favorite song is "You Are My Sunshine" and she hums it when she's happy.
4) Helen's favorite song is "You Are My Sunshine," and she hums it when she's happy.
