A levelling fieldwork was conducted to determine the profile of an existing road that runs road under a bridge. The headroom is also needed for future reference. Using the data given Table Q3, complete a levelling book and determine the headroom. Perform all necessary checks. Staff Readings Table Q3 2.353 (BS): 2.094 (FS); 2.231 (BS) 2.596 (IS) 2.075 (IS) 1.562 (IS) 1.48 (FS); 2.215 (BS) 2.495 (FS); 1.839 (BS) 2.592 (IS) 1.568 (IS) 1.566 (IS) 1.369 (IS) 1.242 (IS) -4.227 (IS) 0.633 (FS); 1.566 (BS) 1.974 (IS) 2.349 (IS) 2.102 (IS) 1.408 (IS) 3.533 (FS) Remarks TBM 1 CP1 H1 H2 H3 CP2 CP3 J1 J2 J3 H5 H6 H7 CP4 J8 K4 K3 K2 TBM 2 TBM 1 (24.919m) H6 (road surface immediately below H7) H7 (underside of bridge) TBM 2 (24.894m) BS= BACKSIGHT; IS = INTERMEDIATE SIGHT; FS = FORESIGHT ANSWER FOR QUESTION 3 INSTRUCTIONS : Data format check Project: RL of reference (first) BM/TBM Close on reference BM/TBM (Y/N) BS a) Enter your answers in the white-coloured cells only. b denotes cell or cells in that column has error. Check data format. c) ## denotes adjacent cell has format error. IS (FS-BS) FS NAME : (Misclosure) (Correction) RISE/FALL (Rise-Fall) N HPC RL Observer: RL of last BM/TBM Date : (RL_first-RL_last) CORRN 0 FINAL RU DIST (Headroom) REMARKS