which activities are on the critical path

the expected completion time of this project is

in the CPM/PERT chart, the slack time for the activity D[2-5]

change last question to F(3-4)

A small manufacturing firm has developed the following list of activities necessary to release a contract for a new plant. The estimated time for the activity G (3-5) is: ( a (optimistic time) = 1, m (most likely time) = 4, and b (pessimistic time) = 7] (Note: Next 4 questions are related to the this statement with the below table). Activity. predecessor time A (1-2) B (1-3) C (1-4) D (2-3) A E (2-5) A F (3-4) BD G(3-5) B,D ? (a=1, m=4, b=7) H (4-6) CF 5 I (5-6) EG 7 In the CPM/PERT chart, the ES and LF for the activity G (3-5) are: a. 11, 16 b. None of the above c. 7, 11 O d. 2, 11 O e. 6, 11