Q$3$ Using the information in Table $2$

$(9$ marks$)$

$\backslash$table$[[$Activity$,$Description,Predecessor$($s$),$Duration $($days$)],[$A$,$Site preparation,None,$2],[$B$,$Lay foundation,A$,1],[$C$,$Build walls,B$,3],[$D$,$Install plumbing,B$,1],[$E$,$Electrical wiring,C$,$ D$,2],[$F$,$Painting,C$,4],[$G$,$Install fixtures,E$,$ F$,5],[$H$,$Final inspection,G$,3]]$

a$)$ Draw A Gantt Chart for the project

$(6$ marks$)$

b$)$ If "Install plumbing" is delayed by $2$ days, how does this affect the project duration?

$(3$ marks$)$