Activity-1-2_duration-3, Activity-2-3_duration-4, Activity-3-4_duration-4, Activity-3-7_duration-4, Activity-4-5_duration-2, Activity-4-7_duration-2, Activity-5-6_duration-3, Activity-5-7_duration-3, Activity-6-7_duration-8 CPM method.. find critical part This one problem please find it mam ..