Suppose that the graph of the velocity function of a particle is as shown in the figure, where t is measured in seconds. YA -1 0 When is the particle traveling forward (in the positive direction)? (Enter your answer using interval notation.) O O O When is it traveling backward? (Enter your answer using interval notation.) What is happening when 5 < t < 7? O The velocity is increasing and the particle is speeding up. O The velocity is decreasing and the particle is slowing down. The velocity is constant and the particle is moving at a steady speed backward. O The velocity is zero and the particle is not moving. O The velocity is constant and the particle is moving at a steady speed forward.

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