In an as$-$built survey, the $xY$ coordinates in meters of three points on the centerline of a highway curve are determined to be $A$:$(3776\mathrm{.}16,4911\mathrm{.}86)$; $B$:$(3581\mathrm{.}15,4872\mathrm{.}03)$;$C$:$(3404\mathrm{.}43,4812\mathrm{.}45).$

Part A

Calculate the coordinates of the center of the curve.

Express your answers in meters to three decimal places separated by a comma.

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Part B

Calculate the radius of the curve.

Express your answer to three decimal places and include the appropriate units.

$R=$

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