Please explain answerplease explain 345 and 6 pointsThank yo

Please explain answer....please explain 3,4,5 and 6 points.....Thank you

Question Given the following information, draw the project network. Compute the early, late, and slack times for the project network. Which activities on the critical path have only the start or finish of the activity on the critical path? Finish-to- Start Additional Lag Finish-to- Start La ID Duration Predecessor Relationshi None 6 Finish-finish C to F 7 Finish-finish E to G9 10 None Start-start G to H None Finish-finish I to J None None G, H Instructions: 1. 2. 3. 4. 5. This is a practical assignment in which you have to draw a proper project network. Draw project network (PERT/CPM) using \'activity on node\' method. (10 Marks) Compute early, late and slack times for each activity. (6 Marks) Identify critical activities/ path and the expected project duration. (4 Marks) Use following legend to show an activity on node: ESActivityE ID Finish Slack Slack LS Duration LF ES: earliest start time LS: latest start time EF: earliest finish time LF: latest finish time 6. 7. 8. 9. For slack and project duration, calculate earliest and latest times first. No theoretical definitions and explanations are required. Consult Chapter 6 of Recommended Text Book for further guidance. Show all necessary working and calculations in your assignment solution.

Solution

3. First we start with A, ES= 0 and EF = ES+duration

Then the task with next B or C , which has preceeding as A, so EF(A) = ES (B ) and ES (C)

and similarly for all subsequent task.

ES for task with 2 preceeding task

ES = EF of Max (B,C)

4.

We track the critical, when the last EF, then the ES for that task = EF of the previous tasks...like

I has Max EF, then ES for I = 26, so the task with EF= 26 is then part of critical path, so then previous EF should be C and like that.

Hence critical path = ACEI

5 and 6

Using all these we get the ES,EF,LS,LF and the Slacks

		Dur		EF= ES+Dur				ES-LS	LF-EF
Task	Pre	Duration	ES	EF	Critical	LS	LF	Start Slack	End Slack
A	None	2	0	2	Yes	0	2	0	0
B	A	4	2	6		4	8	2	2
C	A	6	2	8	Yes	2	8	0	0
D	A	8	2	10		10	18	8	8
E	B,C	18	8	26	Yes	8	26	0	0
F	D	2	10	12		18	20	8	8
G	F	5	12	17		20	25	8	8
H	None	5	0	5		20	25	20	20
I	E	14	26	40	Yes	26	40	0	0
J	G,H	15	17	32		25	40	8	8
		Project duration	(Max of EF)	40