The estimates

(a, m,

b) are listed in the following table:

Project

(a) Project (b)

Activity

(a, m,

b) Activity

(a, m,

b) Activity

(a, m,

b) Activity

(a, m, b)

1-2 (5, 6, 8) 3-6 (3, 4, 5) 1-2 (1, 3, 4) 3-7 (12, 13, 14)

1-4 (1, 3, 4) 4-6 (4, 8, 10) 1-3 (5, 7, 8) 4-5 (10, 12, 15)

1-5 (2, 4, 5) 4-7 (5, 6, 8) 1-4 (6, 7, 9) 4-7 (8, 10, 12)

2-3 (4, 5, 6) 5-6 (9, 10, 15) 1-6 (1, 2, 3) 5-6 (7, 8, 11)

2-5 (7, 8, 10) 5-7 (4, 6, 8) 2-3 (3, 4, 5) 5-7 (2, 4, 8)

2-6 (8, 9, 13) 6-7 (3, 4, 5) 2-5 (7, 8, 9) 6-7 (5, 6, 7)

3-4 (5, 9, 19) 3-4 (10, 15, 20)

Determine the probabilities that the different nodes of the project are realized without delay.