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"A golf ball is hit at ground level. The ball is observed to reach a maximum height above ground level 8.2 seconds after being hit. 0.6 seconds after reaching its maximum height, the ball is observed to barely clear a fence that is 800ft from where it was hit. The acceleration of gravity is 32 ft/s^2.

How high is the fence in feet?"

Now on to my questions:

1)No initial velocity is given, so can I assume that the initial velocity in the y-direction is 0?

2)How can I solve for the missing time that it takes the ball to clear the fence itself from t=8.8 seconds when it reaches the top of the fence?

I'm not looking for answers or for anyone to work the problem for me, only answers to those questions.