4.1.The following table represents data of a project you are working on:

Activity	Predecessor	Most optimistic	Most likely	Most pessimistic
		Time in days
A	_	4	8	24
B	_	3	10	11
C	_	6	12	24
D	A;B	9	14	25
AND	B;C	11	16	27
F	D. E	13	15	35
G	F	5	9	19
H	G	7	15	23

Required:

4.1 Using the PERT formula, calculate the time (t) for each activity. (5)

4.2 Construct the network using the AON methodology. (10)

4.3 Identify the parts and indicate the critical path. (5)

4.4 Explain the advantages of using network diagrams rather than Gantt Charts. (5)