Three activities are candidates for crashing on a proj- ect network for a large computer installation (all are, of course, critical). Activity details are in the following table: Normal Normal Crash Crash Activity Predecessor Time Cost Time Cost ABC 7 days $6,000 6 days $6,600 A 4 days 1,200 2 days 3,000 B 11 days 4,000 9 days 6,000

a) What action would you take to reduce the critical path by 1 day?

b) Assuming no other paths become critical, what action would you take to reduce the critical path one additional day?

c) What is the total cost of the 2-day reduction? P