Problem. Number 16. Let's see the the closed curve C a story, the surfaces closes and F vector field Stokes Theorem says that the line on the surface integral are equal. In other words, we can say that the by an integral off F D X equals the surface off the curl of the vector Field F and yes, to evaluate the line integral, it is enough to evaluate the surface integral. It requires computing the Girl of the Vector Field F She is equal to i, G and K partial derivative with respect to X portion derivative with respect why and fortune derivative with respect to sent two X Y signs, said X squared. Sign That and X squared. Why co signs that peace, which is equal toe the partial derivative off X squared? Why cool signs it with respect. Oh, why minus the partner and derivative of X squared signs that with respect to that, the portion derivative off two x y sign that with respect to Zed minus the partial derivative of X squared, why co signs that with respect Toe X partial derivative of X square sign, then with respect to X minus partial derivative to X Y signs that with respect Oh boy, this is equal to X squared co sign Z minus X squared course Shinzi two x y who signed Z minus two x y Good signs you into X sign the minus two x Why fine. Zini, To get to find an answer off, you know it wins you. The surface integral equals service integrity like 000 off nds which is in Porto zero.