Activity Immediate Predecessor$($s$)$ Time $($Days$)$

A $--3$

B A $4$

C A $6$

D B $6$

E B $4$

F C $4$

G D $6$

H E$,$ F $8$

a$.$ Draw the AON $($activity on node$)$ project network diagram.

b$.$ Calculate ES$,$ EF$,$ LS$,$ LF$,$ and Slack for each activity using the project activity nodes on the AON project network diagram.

c$.$ What is the project completion time?

d$.$ Identify the critical path