Please help me answer A$,$ B and C:Consider the activities for Project Able, and their normal and crash times and costs as shown in the table below. Note that Crash Time is the fastest that the activity can be done and Crash Cost

is the total cost to do the activity at its fastest. Assume that crash costs are linear.

Note: Activity U cannot be crashed.

Suppose that based on the precedence relationships $($not shown here$),$ the project has one critical path $($at the normal times$).$

The critical path is: S$-$V$-$X$-$Y

$($a$)$ Which activity or activities should be crashed in order to reduce the expected project completion time by one period, and what will it cost to do so$?$

The activity$/$activities to crash: $[$firstcrash$]$

The cost to do this crash: $[$firstcost$]$ dollars.

$($b$)$ Suppose that after the crash you just did, the same path is critical and no new critical path has emerged. Which activity or activities should be crashed now, in order to reduce the expected

project completion time by one more period, and what will it cost to do this?

The activity$/$activities to crash now: $[$nextcrash$]$

The cost to do this crash: $[$nextcost$]$ dollars.

$($c$)$ After your crash in part $($b$),$ what is the expected project completion time? $[$time$]$ days.