A company must perform a maintenance project consisting of seven activities.The activities, their predecessors, and their respective time estimates are presented below: 
Using CPM, which activities make up the critical path?
Definitions:
Conservation
In psychology, the understanding that certain properties of objects remain the same despite a change in the object's form or appearance.
Centration
The tendency, especially in young children, to focus on one aspect of a situation while neglecting other relevant aspects.
Play-Doh
A pliable dough used for creative play, primarily by children, allowing for the molding and crafting of shapes and figures.
Centration
Centration is a term from cognitive psychology describing a tendency to focus on one aspect of a situation while neglecting others, common in early childhood development.
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