The height h in feet of a projectile launched vertically upward from the top of a 96-foot tall tower is given by h(t) = 96 + 80t - 16t2.  How long will it take the projectile to strike the ground? What is the maximum height that the projectile reaches?  When does the rocket reach the maximum height?

The height h in feet of a projectile launched vertically upward from the top of a 96-foot tall tower is given by h(t) = 96 + 80t - 16t2. 

1. How long will it take the projectile to strike the ground?
2. What is the maximum height that the projectile reaches? 
3. When does the rocket reach the maximum height?