The term 'slack' indicates $($select all that apply$)$:

Group of answer choices

surplus manpower available at any point in the project.

wastage of resources.

the amount of leeway available for achieving an event without jeopardizing the completion time of the project.

the difference between the earliest possible and latest permissible times of an activity.

a synonym for 'float'.

the difference between the earliest finish and the latest finish times of an activity.

a flaw in the practice of project management.