Find the velocity, acceleration, and speed of a particle with the given position function r(t) = t²i + 7tj + 7 In(t) k (a) velocity 7 2ti+7j+ k (b) acceleration 21 x + ( ² - }) * k t (c) speed 20-3 49 4t² +49 +

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A: We'll answer the first question since the exact one wasn't specified. Please submit a new question…

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A: Velocities (4i-3j+7k) and (2i+3j+4k)

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