Nicholas Glaskowsky, director of personnel of Glaskowsky Resources, Inc., is in the process of designing a program that his customers can use in the job-finding process. Some of the activities include preparing résumés, writing letters, making appointments to see prospectiveemployers, researching companies and industries, and so on. Some of the information on the activities appears in the following table:

Activity	a	m	b	Immediate Predecessor(s)	Expected Time	Variance
A	8	10	12	-	10	0.44
B	6	7	9	-	7.2	0.25
C	3	3	4	-	3.2	0.03
D	10	20	30	A
E	6	7	8	C
F	9	10	11	B, D, E
G	6	7	10	B, D, E	7.3	0.44
H	14	15	16	F	15	0.11
I	10	11	13	F	11.2	0.25
J	6	7	8	G, H
K	4	7	8	I, J
L	1	2	4	G, H

a) Determine the expected times and variances for each activity (above).

b) Determine ES, EF, LS, LF, and slack for each activity.

c) Determine the critical path and project completion time.

d) Determine the probability that the project will be finished in 70 days.

e) Determine the probability that the project will be finished in 80 days. g) Determine the probability that the project will be finished in 90 days.