Construction Planning and Management
In the given figure, the network of a project represents

Activity of excavation which takes 8 units of time
Activity of an excavation of a footing
None of these
Activity of an excavation which starts at event No. 1 and ends at even No. 2

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Construction Planning and Management
Earliest finish of an activity is always

Less than earliest event time of the following node
Greater than or equal to earliest event time of the following node
Greater than earliest event time of the following node
Less than or equal to earliest event time of the following node

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