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1. Find the critical path and the project completion time for the following list of activities. Calculate the probabilities of completing the following project in
   1. 13 days or more
   2. 11 days or less
   3. between 12 and 14 days

Activity	Immediate Predecessor	Optimistic Duration	Most Probable Duration	Pessimistic Duration
A	-	1	3	5
B	-	2	4	6
C	A, B	2	4	5
D	A, B	3	5	7
E	C, D	1	2	10