For the network shown:

a$.$ List ES$,$ EF$,$ LS$,$ LF$,$ and Slack for all activities on the network and identify the critical path and

completion time. $(6$pt$)$

b$.$ For the indirect cost, if the project can be finished in $26$ days, it is $$4500$; if the project can be

finished in $25$ days, it is $$4200$; if the project can be finished in $24$ days, it is $$3900$; if the project

can be finished in $23$ days, it is $$3600$; if the project can be finished in $22$ days, it is $$3200$; if the

project can be finished in $21$ days, it is $$2700.$

For the time and direct cost data shown below, reduce the project completion time by three days.

Assume a linear cost per week shortened, and show, STEP bv STEP, how you arrived at your

schedule. What is the new total cost after crashing the project by three days? What is the new

critical path after crashing the project? $(9$pt$)$