Determine the velocity of projectile when it hits ground

Question

The projectile is launched vertically upward from ground level with the India' velocity of 96 ft/sec h(t) = -1/2gt² + V₀t + H₀ On Earth , g= 32

a) When will projectile hit ground?

b) Determine the velocity of projectile when it hits ground?

c) When will projectile reach its maximum height?

d) Determine the maximum height of the projectile?