State the validity along with respective reasons:

1. LST minus EST of A.

2. Amount of time by which the actual completion of A can exceed its earliest expected time of completion without any delay of the project.

3.Value by which A can be delayed beyond its earliest start point without affecting earliest start time of S.

4.Latest finish time of A minus earliest start time of S.

5. Resource leveling aims at smoothening of the resource usage rate without changing the project duration.

6.Two activities have common predecessor and successor activities. So, they can have common initial and final nodes.

7.In respect of any activity whether real or dummy, the terminal node should bear a number higher than the initial node number.

8.The optimal duration of a project is the minimum time in which it can be completed.

Assume that A is the activity which has a successor 'S'. Answer the following cases with the particular type-Float.