Kinematics, Velocity graphs, Displacement graphs

LINK FOR GRAPH PICTURE
https://postimg.org/image/9yefgd69p/

The above graph represents the motion of two vehicles: A and B

a. What is the acceleration of vehicle A during the first 5.0 s?
b. Calculate the distance between vehicle A and B after 6.0 s?
c. What is the instantaneous acceleration of vehicle A at the 10.0 s mark?
d. What is the average velocity of vehicle A from start to 11.0 s?
e. Sketch an acceleration vs time graph for vehicle A. (rough sketch only showing the general shape)

LINK FOR GRAPH PICTURE
https://postimg.org/image/9yefgd69p/