Construct the project network for a project with the following activity list.

Immediate Estimated Activity Predecessors Duration A — 1 months B A 2 months C B 4 months D B 3 months E B 2 months F C 3 months G D, E 5 months H F 1 months I G, H 4 months J I 2 months K I 3 months L J 3 months M K 5 months N L 4 months