can you solve it please
=0 ayoT
in U
onau
b Assume C is as above and that a solution y exists for every x e U.Define the Neumann-Green function Nxy=Iy-x-yforxy in U,show that if eCUCsolves the NeumannProblem u=finU du dv =gonau' then -f.(y)do(=N(ys(do(+N(.f(ndy