6. For each of the following vector fields, either show that F is conservative by finding onservative by showing t component test. a) F(x, y, z)=(y+2+e*, x + y + z, x + y + cos zã b) F(x, y, z) ãyz, x2+ cos y, yz + sinz) c) F(x, y, z)=(ysin z, x sin z, xy cosz).