help please

Duration in days Activity Predecessor Optimistic 3 B A 2 C A 3 D B, C 8 E B 3 F D 2 G C 6 H F. G 2 Likely 4 5. 6 12 5 4 9 5 Pessimistic 11 8 9 20 12 7 14 8 a) Calculate the expected time to the nearest whole number, for each activity and display in the table below 4 marks Activity A B C D E F G H Expected Time b) Construct the network diagram 5 marks c) Having conducted the forward pass what is the expected completion time of the project 3 marks d) What are the critical activities 5 marks FC e) Which activity can be delayed the longest without delaying the project and for how long 2 marks f) Develop the activity schedule for the project 2 marks g) The OUR has indicated to the NWC that if the well is not repaired and service resumed to the citizens within 35 days they will not receive the rate increase they have applied for. What is the probability that the NWC will get the rate increase they applied for? 4 marks