Given this velocity versus time graph of the missile launched vertical upward in some moment the fuel has run out a

el has run out. a) what was the acceleration of the missile before the fuel has run out? b)Do base on the given graph is it possible to calculate the gravitational acceleration g of the earth?If yes calculate it based on the graph. c)when the missile get the max height from the moment it launched? d)what is the max height the missile reached? e)In how much time the missile will hit the ground from the moment it launched? f)In what velocity the missile hit the ground (direction and magnitude)?