A lubricating oil is driven through a pipe using an electric pump. The speed of an oil particle is plotted in the first 10 s of operation. Determine the acceleration of an oil particle through every stage shown on the graph.

First stage a = 3.5 m/s² ;

Second stage a = -0.6 m/s² ;

Third stage a = 0 m/s²

First stage a = 3.5 m/s² ;

Second stage a = -0.6 m/s² ;

Third stage a = 4.0 m/s²

First stage a = -3.5 m/s² ;

Second stage a = 0.6 m/s² ;

Third stage a = - 4.0 m/s²

First stage a = -3.5 m/s² ;

Second stage a = 0.6 m/s² ;

Third stage a = 0 m/s²