Which of the following statements is incorrect regarding floats?
1. Total float is the time span by which starting or finishing of an activity can be delayed without affecting overall completion time of project.
2. Free float is that duration by which an activity can be delayed without delaying any preceeding activity.
3. Independent float is equal to head event slack
1
1 and 2
2
2 and 3
3
1 and 3
4
2 only