The position vector r describes the path of an object moving in space. Position Vector Time r(t) = t'i + tj + 4t3/2k t = 4 %3D (a) Find the velocity vector v(t), speed s(t), and acceleration vector a(t) of the object. v(t) = s(t) = %3D a(t) = (b) Evaluate the velocity vector and acceleration vector of the object at the given value of t. v(4) = a(4) %3D

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A: As you mentioned part b is solved

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