The table below describes the time information and weeks for constructing any facility.

Activity	Proceeding Tasks	t0	tm	tp	te	Variance
A	-	4	5	6	5
B	-	1	2	3	2
C	A	4	5	6	5
D	B	8	9	10
E	C	1	2	3	2
F	C	4	5	6	5
G	D,E	3	4	11
H	F,G	1	2	3	2

A. What is the expected time for activity D and G? What are the variances for activity A to H?

B what is the critical path and what is the expected project completion time? (Note: expected time for some activities are given above you only need to find those or not given in the variance for each activity)

C. If the project takes less than 20 weeks to finish, there is a $5000 bonus. What is the probability of getting the bonus?