The critical steps for developing a video game are provided in the following table. Also listed are the planned durations and the predecessor(s) for each step.

Activity	Description	Duration (months)	Immediate Predecessor(s)
A	Main storyline design	3	-
B	Main program coding	6	A
C	Character design and attribute configurations	3	A
D	Artwork design	4	A
E	3D graphics design	4	C,D
F	User interface design and graphics integration	3	B,E
G	Alpha testing and debugging	2	F
H	Public testing and final adjustment	1	G
I	Media exposure and advertisement	5	E
J	Major launch preparation	1	H,I

1. Draw an activity-on-node (AON) network diagram for the project.
2. Compute the earliest start (ES), earliest finish (EF), latest start (LS), and latest finish (LF), and slack for each activity. Display all values in a table format.
3. Determine the critical path(s) for the project. What is the project duration (in months)?
4. Which activities are non-critical and how much slack does each non-critical activity have?