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The position of a particle traveling along a horizontal line in t seconds is s(t) = 2+3 - 12t - 126+ + 6 meters.

The position of a particle traveling along a horizontal line in t seconds is s(t) = 2+3 - 12t - 126+ + 6 meters. (a). Find the velocity and acceleration functions at time t = 3 seconds. (b). Is the particle moving from right to left or from left to right at time t = 7 seconds?

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