For the following sitution draw a PERT network, and determine the following:

1. Critical path
2. ES,LS,EF,LF and slack time for each activity
3. Probability to complete the project in 8 days plus the calculated expected completion time or less.
4. Given the answers obtained in parts a and b, suppose the project has fixed costs per day of $1000. Also suppose you could reduce the length of the projects duration by expediting certain activitys expected time at a given cost shown in the table above to some minimum number of days, what would you recommend?
5. 

Activity Immediate predecessor(s) Optimistic Most probabl time time Pessimistic Crashing time cost/day $$ 900 400 700 800 Minimum expected completion time 1 2 3 3 A B D E F G H I J K L M N 300 500 700 5 3 3 1100 650 300 2 3 4 -SM-ZOROVA A A A A B B D F,G,H HI HI D M M D M P.Q. O,R J.K,L,N J.K J.K E,S,T,U,V E,S,T,U,V W X,Y 1 3 4 2 9 7 4 1 5 3 2 7 8 10 3 6 8 3 7 6 4 2 5 9 3 7 1 6 5 3 9 8 7 3 6 4 3 7 9 15 6 12 9 6 8 7 5 2 6 10 4 8 1 8 6 4 15 8 9 9 7 8 7 8 15 17 9 13 12 7 12 12 5 2 9 10 6 9 1400 600 550 980 7 4 7 4 520 5 100 1 T U V W X Y 650 50 250 3 2 4 N Activity Immediate predecessor(s) Optimistic Most probabl time time Pessimistic Crashing time cost/day $$ 900 400 700 800 Minimum expected completion time 1 2 3 3 A B D E F G H I J K L M N 300 500 700 5 3 3 1100 650 300 2 3 4 -SM-ZOROVA A A A A B B D F,G,H HI HI D M M D M P.Q. O,R J.K,L,N J.K J.K E,S,T,U,V E,S,T,U,V W X,Y 1 3 4 2 9 7 4 1 5 3 2 7 8 10 3 6 8 3 7 6 4 2 5 9 3 7 1 6 5 3 9 8 7 3 6 4 3 7 9 15 6 12 9 6 8 7 5 2 6 10 4 8 1 8 6 4 15 8 9 9 7 8 7 8 15 17 9 13 12 7 12 12 5 2 9 10 6 9 1400 600 550 980 7 4 7 4 520 5 100 1 T U V W X Y 650 50 250 3 2 4 N