The operations manager left the following files on the computer:

Most Immediate Optimistic Pessimistic Activity Likely Predecessors (weeks) (Weeks) (weeks) A 4 7 11 B 9 16 C A 6 10 15 D AB 11 14 E C 12 20 F C 12 16 20 G D. F 7 H E 5 9 10 I H 6 12 G. I 2 3lygoes ooif 68 080808 4: 080803 Notes: 1. TV ads lose effective over time, exposure level drop from 2 to 1 after a maximum of 10 ads 2. Radio ads lose effectiveness over time, exposure level drops from 2 to 1 after a maximum of 15 ads 3. Online ads lose effectiveness over time, exposure level drops from 2 to 1 after a maximum of 20 ads