hi please assist with the below project management question

The following information relates to a project you are working on:

Activity	Predecessor	Optimistic time	Most likely time	Pessimistic time	Expected
		In days
a	-	3	6	8
b	-	2	4	4
c	-	1	2	3
d	a,b	6	7	8
e	c	2	4	6
f	e	6	10	14
g	e	1	2	4
h	d	3	6	9
i	g,h	10	11	12
j	f,g	14	16	20

3.1 Calculate the expected completed time for each activity. (10)

Note that in practice you always round the number up to the next full number since you create extra slack time for the project team.

3.2 Construct the network diagram (AON). (10)

3.3 Identify the paths and indicate the critical path. (5)