5. Given the points $A(-2,3,1), B(3,0,-1), C(2,2,-3)$, determine the equation of the line $r$ passing through $A$ and $B$ and the equation of the plane $\pi$ perpendicular to $r$ and passing through $C$.
5. Given the points $A(-2,3,1), B(3,0,-1), C(2,2,-3)$, determine the equation of the line $r$ passing through $A$ and $B$ and the equation of the plane $\pi$ perpendicular to $r$ and passing through $C$.