Step-by-step explanation:
The computation of the number of slacks in the project A when it is finished is
= Total completion time -- Task A planned days - Task B planned days - Task C planned days
= 25 days - 9 days - 5 days - 8 days
= 3 days slack
Simply we subtract the total planned days taken by each task from the total completion time on a project so that the number of slacks has come
Therefore, it came positive 3 slacks time