Provide the levelling readings and calculations for the rise and fall method, given the Reduced Level of T.B.M. A is 106.320 m.

Here is the solution for the levelling activity.

Part a) Rise and Fall Method and Checks

The readings are extracted from the diagram and categorized as Backsight (BS), Intermediate Sight (IS), and Foresight (FS) for each instrument setup. The Reduced Level (RL) of T.B.M. A is $106.320 \text{ m}$.

Readings:

• INST ST 1: BS on A = $2.700 \text{ m}$, IS on B = $2.990 \text{ m}$, FS on C = $0.995 \text{ m}$
• INST ST 2: BS on C = $2.745 \text{