8. (Section 4.3) A motorboat is traveling at a constant velocity of 5 meters per second when it starts to decelerate to arrive at a dock. Its acceleration, in m/s², is a(t) = -t. (a) What is the velocity function v(t) of the motorboat? (b) What is the position function s(t) of the motorboat given s(0) = 0? %3D

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