Can you answer number 1 and number 2, please show all calculations. thanks

1) Lucy is in charge of planning and coordinating a project. Following is the activity information for this project. Time (weeks) Activity Preceded By Optimistic Most Likely Pessimistic A 2 2 4 B A 8 12 16 C A 4 8 12 D B,C 2 4 6 E B 4 6 8 F A 2 4 6 G D 2 4 6 H G 2 4 6 E,F,H 2 2 2 Requested: (a) Construct a precedence diagram. (b) Identify the Critical Path(s) and the expected completion time. (c) What is the probability that the training program can be completed in 26 weeks? Page 3 of 9 UNICA 2) Following is a table listing the project activities, sequencing requirements and other relevant information: Expected Time Direct Cost Activity Preceded Regular | Crash Regular| Crash By A 6 days 2 day $2000 $3800 B -- 12 6 2000 10000 C A 4 2 1000 4000 D B, C 10 6 3400 4600 E D 8 6 2800 3900 F E 6 2 5000 7600 G B, C 18 8 16000 19600 I F, G 6 4 2000 4000 Requested: (a) Construct a network including the Early and Late Start and Finish times. (b) Identify the normal Critical Path(s) and the normal expected completion time (c) Can the project be crashed to last 18 days? Which activities should be crashed and at what additional cost