An office complex is to be renovated. Before the job can be completed, various trades people and skilled workers must install their materials. The table at the top of the next page describes the relationships between the activities that need to be completed.
(a) Develop a project network for this problem.
(b) Determine the EST, EFT, LST, LFT, and slack for each activity. Also determine the total project completion time and the critical path(s).

IMMEDIATE PREDECESSORS TIME (DAYS) ACTIVITY A1 A2 A4 A5 A6 A7 A8 A9 A10 A1 Al A1 A2 A3, A4 A4 A4 A5, A6, A7 A8