Question $4$

The contractor entered into an incentive type contract in which the contractor will receive a reward of $R50000$ for every day saved in the project. The table below shows the activity crash times and costs.

$\backslash$table$[[$Activity ID$,$normal time,Crash time,$\backslash$table$[[$Normal costs$],[($Rand$)]],\backslash$table$[[$Crash cost$],[($Rand$)]],\backslash$table$[[$Slope $($Rand$/],[$week$)]]],[$A$,$A$,7,$W$,300,000\mathrm{.}00,50,000\mathrm{.}00$