given. Find Jc Vf . dr, where C has parametric equations x = 12 +1 y 0 2 X 6 4 0 3 5 2 8 2 9 12- 3-10 Determine whether or not F is a conservative vector field. part If it is, find a function f such that F = Vf. 3. F (x, y) = (xy + y?) i + (x2 + 2xy) j 4. F(x, y) = (y2 - 2x) i+ 2xy j 13. 5. F ( x, y) = yeni + (1 + xy)ery j 6. F(x, y) = yexit (e" + ex) j 14. (7. F (x, y) = (ye* + sin y) i + (e* + x cosy) j 8. F (x, y) = (2xy + y -2) i + (x2 - 2xy 3) j, y > 0 15