4. Magic Box Inc. is developing a new prototype of the car alarm protection system. Mr.

Hasan is the project manager for this new alarm system development project. Mr. Hasan creates a sequence of activities described below.

No	Activities	Predecessor	Duration (in days)
1	A	None	5
2	B	A	7
3	C	A	10
4	D	B, C	12
5	E	D	9

a. Draw an Activity on Node (AON) network diagram based on the activities

described above.

b. List ALL paths in the network diagram and calculate the total duration of each

path.

c. Define the critical path in English using your own words.

d. Which path is the critical path?

e. How many days does it take to finish the project?

f. Calculate the early start, late start, early finish, late finish, and slack of each activity. Use 0 as the starting day. You dont need to show me the step-by-step calculation. Simply put the calculation results on the AON diagram.