Computer · Surveying

The following observations were made during a leveling survey: The reduced level (RL) of a bench mark (BM) at Point A (bottom of a lintel) was 101.50 m. The staff reading (inverted) on the BM was 2.25 m, and the reading at Point B on the ground before shifting the instrument was 1.05 m. After changing the instrument position, the staff reading to Point B measured 1.35 m. If the last reading taken at the bottom of a canopy (Point C) with an inverted staff was 4.10 m, what is the RL of Point C?