Using the table below, answer the four questions.

		Days
Activity	a	m	b	Immediate predecessors
A	8	10	13	-
B	6	7	8	-
C	3	3	6	B
D	10	18	28	A, C
E	6	7	8	C
F	9	10	11	D, E
G	5	7	11	A,D,E
H	15	16	17	F
I	10	13	15	F, G
J	6	7	8	G, H
K	4	7	10	I, J
L	1	3	6	G, H

(a=optimistic; m=most likely; b=pessimistic)

1. Using the network diagram, determine the EST, EFT, LST, LFT, slack time for each activity, critical path, and project completion time. 3. What is the probability that the project will be finished in 75 days? 4. What is a new expected completion time when the project needs to be done on time with the 90% probability.