8. Let F(r, y) = (P(x, y), Q(r, y)) be a vector field which is continuously differentiable every- where on Ra, except for the origin (0,0). Let Or be the circle s ty = R, oriented counter-clockwise (the subscript on the symbol ( represents the radius of the circle). Sup- pose that F satisfies: AP =2, - F . dr = 9. Evaluate F . dr. (3 points) (A) 9x (b) 3x (c) 2x (d) * (e) 0