1. The problem statement, all variables and given/known data Use the surface integral in stokes theorem to find circulation of field F around the curve C. F=x^2i+2xj+z^2k C: the ellipse 4x^2+y^2=4 in the xy plane, counterclockwise when viewed from above 2. Relevant equations stokes theroem: cirlulation=double integral of nabla X F.n d(sigma) 3. The attempt at a solution i got nabla cross F is 2k for the normal, aint it just k? coz im getting confused by if i let g(x,y,z)=4x^2+y^2-4=0 (the elispe) isnt n=grad(g)=8xi+2yj im confused with this also should i parameterize the ellipse? im not sure how im meant to set the double integral out? im really lost, any help please?