For the curve given by

                                       r(t)=⟨4sin(t),2t,−4cos(t)⟩r(t)=⟨4sin⁡(t),2t,−4cos⁡(t)⟩,

Find the unit tangent
T(t)=

Find the unit normal
N(t)=

Find the curvature
κ(t)=