t Calculate the velocity and acceleration vectors and the speed of r(t) = ( √6 +²₁² ²1 1 6+1² (Use symbolic notation and fractions where needed. Give your answer in the vector form.) v(4) = a(4) = Calculate the speed of r(t) at the time t = 4. (Use symbolic notation and fractions where needed.) v(4) = ) at the time t = 4.

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