Can someone help me answer this, it's about Functions. It'll be a great help! Thank you!

D. When an object is launched, the path of the projectile is given by the function s(t) =- 4.9r + vt + h, where v is the initial velocity as it is launched and h is its initial height. Suppose a missile is launched from a platform 68.6 ft above the ground, at an initial velocity of 24.5 ft/s. 10. What is the quadratic function that models the path of the missile? 11. What is the maximum height that can be attained by the missile? Give the exact value of the answer, up to 3 decimal places. 12. How many seconds after the launch will the missile reach its maximum height? 13. How many seconds after the launch will the missile hit the ground