Your project team has been assigned to develop and launch an it system for a local healthcare company. Use the information in the table below to construct a network diagram using the AON method.

$\backslash$table$[[$Activity ID$,$Description,Duration $($days$),$Predecessor$],[$A$,$Requirement analysis,$5,],[$B$,$Systems design,$15,$A$],[$C$,$Programming,$25,$B$],[$D$,$Telecoms,$15,$B$],[$E$,$Hardware installation,$30,$B D D$],[$F$,$Integration,$10,$G$],[$G$,$System testing,$5,$H$],[$I$,$Handover and GD$-$live,$5,]]$

$1\mathrm{.}1$ Construct a network diagram using the activity$-$on$-$the$-$node method.

$(9)$

$1\mathrm{.}2$ Conduct the forward and backward passes to calculate your ES$,$ EF$,$ LS and LF times for each activity.