How can I solve this??

Let C be the closed, piecewise smooth curve formed by traveling in straight lines between the points (0,0,0), (2,1,5), (1,1,3) and back to the origin, in that order. Use Stokes' theorem to evaluated the integral: (xyz)dx + (xy)dy + (x)dz

I think I need to parameterize the points, but after that Im stuck.