There are four critical paths in a network. A-B-C-D-E, A-F-E,
A-B-H-J-K-E and A-S-T-E. Each activity in this network can be
crashed by a maximum of 2 weeks. The crashing cost (per week), for
the first week, for activity A is: $540, E is $545 and all other
activities is : $135 (per week per activity). The crashing cost,
second week and onwards, for activity A is $1080 per week, E is
$1350 per week and for all other activities is...