Question: d For the leveling network shown below, the arrows go towards the points with higher elevations. points A and B are benchmarks with known elevations

For the leveling network shown below, the arrows go towards the points with higher elevations. points A and B are benchmarks with known elevations (i.e.. error free) of 281.130m and 269.135m. respectively, while the measured elevation differences are shown in the table below. The measurements are independent and the weight of each measured elevation difference is proportional to the reciprocal of the distance between the two end point points. The least-squares estimates for the elevations of points C and D are: ilne Distance Measured elevation (km) difference (m) :

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