$6$

$0$

$$points

$)$

$$The duration and cost for each activity in normal and crash situations for a project

network are shown below. Answer the following questions.

$($

$2$

$0$

$$points

$)$

$$Use marginal analysis to find the least expensive way to crash

$($

reduce the

duration of

$)$

$$activities so the project duration is reduced to

$1$

$3$

$$weeks from the normal

$1$

$5$

weeks.