The network rules are common to all activity on arrow networking systems. The use of computers for making computations may impose certain rules. Which of the following basic rules of network logic are correct?
(1) Before an activity may begin, all the activities preceding it must be complete.
(2) Any two events may be directly connected by no more than one activity.
(3) Event numbers must not be duplicated in a network.
Select the correct answer using the codes given below:
1
(1) and (2)
2
(2) and (3)
3
(1) and (3)
4
(1), (2) and (3)
5
Question Not Attempted