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Suppose an object moves along a line at 15 m/s, for 0 ≤ t ≤ 2,
and at 25 m/s, for 2 ≤ t ≤ 5, where t is measured in seconds.
Sketch the graph of the velocity function and find the displacement
of the object for 0 ≤ t ≤ 5.

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