$2\mathrm{.}1\mathrm{.}3$ Complete the following table so as to determine the forward and backward passes of this project.

$(8)$

$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$Predecessor$]],\backslash$table$[[$Time$],[($months$)]],\backslash$table$[[$Early$],[$Start$]],\backslash$table$[[$Early$],[$Finish$]],\backslash$table$[[$Late$],[$Start$]],\backslash$table$[[$Late$],[$Finish$]],$Slack$],[$A$,$None,$4,,,,,],[$B$,$None,$5,,,,,],[$C$,$A$,$ B$,2,,,,,],[$D$,$B$,2,,,,,],[$E$,$D$,3,,,,,],[$F$,$A$,$C$,6,,,,,],[$G$,$E$,$F$,1,,,,,],[$H$,$G$,2,,,,,]]$

$[$TURN OVER$]$

$-5-$

EPT$2602$

$2\mathrm{.}2$ Three activities are candidates for crashing on a network for a large computer installation project $($all activities are critical$).$ Activity details are in the following table:

$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$predecessor$/$s$]],\backslash$table$[[$Normal time$],[($days$)]],\backslash$table$[[$Crash time$],[($days$)]],$Normal cost,Crash cost$],[$A$,$None,$12,11,$R$20000,$R$21000],[$B$,$A$,7,6,$R$8000,$R$11000],[$C$,$B$,8,6,$R$12000,$R$15000]]$

$2\mathrm{.}2\mathrm{.}1$ Calculate the crash cost per day for each project activity.

$(2)$

$2\mathrm{.}2\mathrm{.}2$ Determine the least cost of crashing the project by two $(2)$ weeks. $($Show full calculations$)$

$(2)$