3. DETAILS SCALCET9 16.XP.5.014. MY NOTES ASK YOUR TEACHER Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = Vf. (If the vector field is not conservative, enter DNE.) F(x, y, z) = ezi + 2j+ xezk f ( x, y, z) = 4. DETAILS SCALCET9 16.XP.5.016. MY NOTES ASK YOUR TEACHER Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = Vf. (If the vector field is not conservative, enter DNE.) F(x, y, z) = y cos(xy) i + x cos(xy)j - 9 sin(z) k f ( x, y, z) =