Table $1-$ The Krugersdorp Examination Block Construction Project

$\backslash$table$[[\backslash$table$[[$Activity$],[$No$.]],\backslash$table$[[$Activity$],[$Description$]],\backslash$table$[[$Duration$],[($Weeks$)]],\backslash$table$[[$Predecessor$],[$Activity$]]],[$A$,\backslash$table$[[$Clear$],[$ground$]],3,--],[$B$,\backslash$table$[[$Dig$],[$foundation$]],4,$A$],[$C$,\backslash$table$[[$Procure$],[$cement$]],2,$A$],[$D$,\backslash$table$[[$Sink$],[$columns$]],5,$B$],[$E$,\backslash$table$[[$Procure$],[$floor mash$]],1,$C$],[$F$,\backslash$table$[[$Pour$],[$concrete$]],2,$C$],[$G$,\backslash$table$[[$Leave$],[$concrete to$],[$dry$]],4,$D;E$],[$H$,\backslash$table$[[$Inspect$],[$foundation$]],1,$F;G$]]$

$2\mathrm{.}1$ Use the activities in Table $1$ to draw the network diagram.

$2\mathrm{.}2$ Calculate the critical path $($CP$)$ for this project.

$2\mathrm{.}3$ Calculate the earliest start $($ES$)$ and the earliest finish $($EF$)$ for all the activities in this project and complete the table below.

$(8)$

$\backslash$table$[[$Activity No$.,$ES$,$EF$],[$A$,,],[$B$,,],[$C$,,],[$D$,,],[$E$,,],[$F$,,],[$G$,,],[$H$,,]]$