8.
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The diagram shows the circle with equation \(x ^ { 2 } + y ^ { 2 } - 2 x - 18 y + 73 = 0\) and the straight line with equation \(y = 2 x - 3\).
- Find the coordinates of the centre and the radius of the circle.
- Find the coordinates of the point on the line which is closest to the circle.