QUESTION 6 The table below gives the duration estimates in days for a construction projection. Activity Predecessor Optimistic Most Likely A B C D E F G H K L A A B C E, F D G H,J I,K 2 1 3 9 2 6 5 3 4 6 3 7 4 3 5 11 5 9 10 5 7 9 4 10 Pessimistic 7 6 8 20 7 20 22 12 9 13 6 23 (20 Marks) 6.1 Determine the expected completion time for each activity. Round off answers to the nearest whole number. 6.2 Construct an AON network for the activities of this contract. 6.3 Determine the critical path for the project by calculating the slack for each activity. (5 marks) (5 marks) (10 marks)