Find the unit tangent vector to the curve given below at the specified point. r(t) = 7ti−2t²j¸ t = 4 O T(4) = O T(4)= O T(4)= T(4)= 7 305 -2 305 7 305 i- -i- i- 16 √305 i- 16 305 2 305 14 16 √305 √305 j

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