The unit tangent vector T and the principal unit normal vector N for the parameterized curve r(t) = (11 cos t,11 sin t,12t) are shown below. Use the definitions to compute the unit binormal vector and torsion for r(t). (- 11sin t,11cos t,12) T = V 265 N = (- cos t, - sin t,0) The unit binormal vector is B= ( ). (Type exact answers, using radicals as needed.) The torsion is t= (Type an integer or a simplified fraction.)