5. +-1.25 points SCalcET8 16.5.513.XP Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = (If the vector field is not conservative, enter DNE.) F(x, y, z) = 18xy. + (9x2 + 8yzjj + 4y4k f(x, y, z) = 6. /1.25 points SCalcET8 16.5.515.XP Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F =å (If the vector field is not conservative, enter DNE.) F(x, y, z) = ye-x1+ e-xj + 9zk f(x, y, z)