PART B $(45$ marks$)$

Instruction: Answer ALL questions in the examination paper.

Figure $1$ shows a network of levelling survey. Solve the height calculation for TBM $2.$

$1$gunc

$\backslash$table$[[$LEVELLING$],[$Project :$,$TBM $2$ Calculation, Faculty of Engineering & Built Environment, UKM$],[$Group :$,8],[$Name : Covid, Corona & Tedros,Date :$],[$Station$,$B$.$S$.(+),$H$.$O$.$I,F$.$S$.(-),$LEVEL,MARK$],[$BM $1,,,,25\mathrm{.}889,$Level at BM $1],[$C$],[D$