Computer Hardware Development, Inc. (better known as CHaD - also the President and CEOs name) is developing a new laptop computer for students.

Activity	ID	Immediate Predecessor	Time (Wks)
Design Laptop	A		21
Build Prototype	B	A	5
Evaluate Design	C	A	7
Test Prototype	D	B	2
Write Manual	E	C, D	5
Prep Production	F	C, D	8
Test Production	G	E, F	2

CHaD has recalculated their project scheduling information to include uncertainty into the activity times as indicated below:

Activity	ID	a	m	b	t	v
Design Laptop	A	10	22	28
Build Prototype	B	4	6	14
Evaluate Design	C	4	4	10
Test Prototype	D	1	2	3
Write Manual	E	7	8	9
Prep Production	F	1	5	9
Test Production	G	2	2	2

a) Determine the critical path

ID	ES	EF	LS	LF	TS	CP
A
B
C
D
E
F
G

b) What is the probability the project is completed in 44 weeks or less?

c) What is the probability the project is completed in 38 weeks or less?

Edit: would this work now?