$(1$ point$)$ Use Stokes' Theorem to evaluate ${\displaystyle \underset{C}{\overset{\phantom{}}{}}}F*dr$ where $F(x,y,z)=+yj+1(x^2+y^2)k$ and $C$ is the boundary of the part of the paraboloid where $z=25-x^2-y^2$ which lies above the $xy-$plane and $C$ is oriented counterclockwise when viewed from above.