D.B.
There is no right or wrong answer. Just leave enough time for her to be a kid. That means play time. She needs to be able to play independently and should also be able to play with other children without adult intervention. Over scheduling kids results in children that do not know how to play. If they are constantly in classes that tell them what to do and when to do it they do not learn the valuable lesson of independence and making choices. Teachers are seeing this more and more in school, students who have a hard time working alone and in constant need of directions. Just give her plenty of time to be a kid and then you will know she is not overscheduled.