Solve the all parts of given question:
Question: An object moves in a straight line with a constant acceleration. For a particular one-second interval, its average velocity is 2 m/s. In the next two second interval, its average velocity is 8 m/s.
Part A: What is the total displacement for the combined intervals?
Part B: Suppose that the motion started at t=0 s and the one second interval started at t= 3 s. What was the velocity at t= 0s?
I need help to find the total displacement for the combined intervals.