.. 3.30 Three activities are candidates for crashing on a project network for a large computer installation (all are, of course, critical). Activity details are in the following table: ACTIVITY PREDECESSOR NORMAL TIME NORMAL COST CRASH TIME CRASH COST A 7 days $6,000 6 days $6,600 B A 4 days 1,200 2 days 3,000 0 B 11 days 4,000 9 days 6,000 b. What action would you take to reduce the critical path by 1 day? c. Assuming no other paths become critical, what action would you take to reduce the critical path 1 additional day? d. What is the total cost of the 2-day reduction? [PXI