2. [5 Stokes’ Theorem: Let S be a piecewise smooth oriented surface having a piecewise smooth boundary curve C. Let F = Mi+Nj+Pk be a vector field whose components have continuous first partial derivatives on an open region containing S. The the circulation of F around C in the direction counterclockwise with respect to the surface’s unit normal vector n equals the integral of the curl vector field V x F over S: F dr = / /VxF n da counterclockwise Now consider the vector field F=- i + 2+y2 which is defined on the punctured disk D defined by those points in the ay-plane satisfying 0