the path of the goof ball is modled by h= -2t^2+14t

1. how long will the golf ball be in the air after it is hit?

2. there is a 6 meter cedar tree that the ball encounters at approximately 3 seconds after it is hit. does the ball pass over the tree or hit it?

3. what is the maximum height that is reached by the ball, and at what time does it happen