A construction company has listed down various activities that are involved in constructing a community hall. These are summarized along with immediate predecessor(s) details in the following table.

Details of Activities and Immediate Predecessor(s)
Activity Description Immediate Predecessor(s)
A Plan approval —
B Site preparation —
C Arranging foundation materials A D Excavation for foundation B E Carpentry work for door and window main supporting frames A F Laying foundation C,D G Raising wall from foundation to window base F H Raising wall from window base to lintel level E,G I Roofing H J Electrical wiring and fitting I K Plastering J,L L Making doors and windows and fitting them A M White washing K N Clearing the site before handing over M Draw a project network for the above project.AppendixLO1