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Two students are looking at their phones while walking in the hallway. This results in them colliding head on with one another. The first student has a mass of 62 kg and is moving to the right at 3.80 m/s while the second student has a mass of 67 kg and is moving to the left at 2.59 m/s. After the collision, student A bounces backwards at 1.17 m/s. Determine the final velocity of student B. (Treat velocity to the right as positive and velocity to the left as negative.)