A ball is thrown vertically upward into the air. If the ball started from a height of 32 feet off the ground, use the formula to represent the projection of the ball : H=-16t²+7t+32, Where H is the height of the ball after t seconds have passed. Based on this information, answer the following question:

1) When does the ball reach maximum height? Show your work please. Thank you.

HINT: The maximum occurs at the vertex of the parabola