Two critical path activities are candidates for crashing on a CPM network.Activity details are in the table below.To cut one day from the project's duration,activity ________ should be crashed first,adding ________ to project cost. 
Definitions:
Intellectual
Relating to the ability to think and understand ideas and information at a complex level.
Creative
The quality or ability to create or invent something original and valuable.
Cross-sectional Studies
Research that analyzes data from a population, or a representative subset, at a specific point in time to examine relationships between variables.
Cohort Effects
Differences among people that stem from being born at different times or periods, leading to distinctive formative experiences.
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