How to find acceleration and displacement from this graph

Explanation:

In a velocity vs time graph, the slope of the graph is the acceleration. The area below the graph is the displacement. This gives the following answers:

19)

positive acceleration in A,B

negative acceleration in D,E

20)

greatest magnitude of acceleration in B

21) the object is standing still at the beginning of A

22) the speed is not changing in C

23) the area below the graph in A is 25/2 = 12.5

24) The area below the graph in B is 25 + 50/2 = 50