A circle of radius r centered at the point (0,r) in the plane will intersect the y-axis at the origin and the point A=(0,2r), as pictured below. A line passes through the point A and the point C=(9r2,0) on the x-axis.

(a) The line through A and C has equation: y= ? x + ?(b) The x-coordinate of the point B is ? .(c) The y-coordinate of the point B is ? .(d) The limit as r->infty of the x-coordinate of B is (if your answer is infty , write infinity) ?(e) The limit as r->infty of the y-coordinate of B is (if your answer is infty , write infinity) ?