Question 5 (20%) Consider a project with the following information. Activity Immediate Optimistic Most likely Pessimistic Predecessors A 4 7 B A N O 10 C B 9 A 13 14 C O 14 B 6 16 DEF 2 8 a) Calculate the expected activity times (round to nearest integer) b) Calculated the activity slacks. Use AON methodology to find the length of the project and critical path. c) Construct the project activity network using AOA methodology and label each node and arrow appropriately. Identity all the dummy activities required to complete the network