Pick up the incorrect statement from the following:

• The difference between the earliest start time and latest finish time of any activity, is the maximum time available for the activity
• The difference between the maximum time available for the job and actual time it consumes, is called total float
• The difference between the latest start time and earliest start time of an activity, is called total float
• The difference between the earliest finish time of an activity and the earliest start time of its successor activity, is called free float of the activity
• None of these.