Q.4. Solve the following problem using the following data:

Task	Predecessor	ta	tm	tb
A	----	1	2	9
B	-----	2	5	8
C	----	1	3	5
D	A	4	10	25
E	A	3	7	12
F	B	10	15	25
G	C	5	9	14
H	D ,E	2	3	7
I	D ,E, F	1	4	6
J	D, E , F, G	2	5	10
K	H, I, J	3	3	3

a. Draw a pert Diagram

b. Compute Expected completion times for all tasks

c. Find the critical path and the expected completion time

d. What is the completion time that gives you 75% chance of success