16 An office complex is to be renovated. Before the job can be completed, various tradespeople 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).

ACTIVITY IMMEDIATE PREDECESSORS TIME (days)
A1 — 5 A2 A1 6 A3 A1 2 A4 A1 9 A5 A2 9 A6 A3, A4 3 A7 A4 7 A8 A4 4 A9 A5, A6, A7 6 A10 A8 5