Evaluate v . dr in the case that v = (5 -4x +3y, -3x - 4y, 322 +5y). and C is the helix parametristd by r(t) = (cos(t), sin(t), t), for t E [0, ]. Enter only the final answer in exact form (no decimal approximations). You may need to use the oo palette to access symbols. Jc v . dr a sin (a) OO ?? ar