III. Task time estimates for a production line setup project at WinTech Kuala Lumpur are as follows:

$\backslash$table$[[$Activity$,$Time $($hours$),\backslash$table$[[$Immediate$],[$Predecessors$]]],[$A$,6\mathrm{.}0,-],[$B$,7\mathrm{.}2,-],[$C$,5\mathrm{.}0,$A$],[$D$,6\mathrm{.}0,$B$,$C$],[$E$,4\mathrm{.}5,$B$,$C$],[$F$,7\mathrm{.}7,$D$],[$G$,4\mathrm{.}0,$E$,$F$]]$

a$.$ Draw the project network using AON

b$.$ Identify the critical path

c$.$ What is the expected project length?

d$.$ Draw a Gant Chart for the project