Ada, using a steel tape, measured a certain line that is divided into four segments. Each segment was measured several times. The following data were determined from the first to the last segment respectively: (97.702,±0.05)m, (57.972,±0.06)m, (75.98,±0.042)m, and (57.015,±0.042)m. Determine the length (m) of the line.