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

Group of answer choices

a synonym for 'float'.

wastage of resources.

a flaw in the practice of project management.

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

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

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

surplus manpower available at any point in the project.