Area Bounded by Line Segments and a Parabola

wo of the points on a parabola $y=x^2$ are $N$ at $(-3,9)$ and $S$ at $(3,9)$. Point $B$, meanwhile, is at $(0,3)$. What is the area bounded by the line segment $NB$, the line segment $BS$, and the parabolic arc $NS$?