A bank branch office plans to do an office space expansion project and all the activities of this project are provided in the following table. Activity Immediate Predecessors Duration (Weeks) Available Weeks to crash Crash cost per week A - 3 0 NA B - 3 2 $600 C B 2 1 $800 D A,B 4 1 $800 E C 3 1 $900 F C 4 2 $3000 G D,F 5 3 $1200 H E,G 2 1 $3000 What is the project duration in terms of weeks