The following planning network with activity times in days represents a hypothetic battle plan during the Iraq invasion. a- Find the critical path and the project duration b- Determine the earliest and latest activity times, and activity slack for the network. (Show your answers in a table) Move engineering division 2 Build pontoon bridges Create supply lines 2 Develop plan Cavalry reconnaissance Advance cavalry scout 3 Artillery placement Attack 12 2 1 Plan fortifications 1 Army march 4 10 3 Cavalry disruption of enemy supply lines 4 Troops build earthworks