In the following network, manually level your resources using Microsoft. Excel, so that you may not use more than nine laborers per day at any time. Show your solution with $2$ bar charts and $2$ histograms. Bar charts and histograms must be produced both before and after leveling. $(40$ points$)$

$\backslash$table$[[$ACTIVITY$,$DURATION$($DAYS$),$IPA,LABORERS$],[$A$,2,-,3],[$B$,4,$A$,2],[$C$,6,$A$,4],[$D$,9,$A$,3],[$E$,5,$B$,4],[$F$,$B$,$ C$,2,],[$G$,7,$D$,$ E$,$ F$,3]]$

With regard to resource leveling, how does the role of a scheduler differ between working for a general contractor who does almost all his or her work with his$/$ her own workforce, and how does scheduling differ for a general contractor who subcontracts everything? $(10$ points$)$