For the given position vectors r(t) compute the unit tangent vector T(t) for the given value of t . A) Let r(t) = (cos 2t, sin 2t). Then T(#)([ ].> B) Let r(t) = (t2, +3). Then T(5) = ([ ].> C) Let r(t) = elite 5tj + tk. Then T(3)= it j+ k