i stuck here please solve this question

(b) ( 10 points ) Let C denote the boundary of that part of the plane xty+ z = 1 lying in the first octant oriented counterclockwise as seen from above. Let F denote the vector field defined on R3 by F = . Evaluate the line integral f, F . Tds by first using Stoke's Theorem to con- vert the line integral to a surface integral and then by calculating the surface integral