1. The problem statement, all variables and given/known data consider the vector field v(x,y,z)=(-h(z)y,h(z)x,g(z)) wherer h:R->R and g:R—>R are differentiable .Let C be a closed curve in the horizontal plane z=z0.show that the circulation of v around C depends only on the area of the reion enclosed by C in the given plane and h(Z0) 3. The attempt at a solution i know it is simple,but i dont know how to star it. should i parameterize the curve c ? but how? could someone give me some details hints????