Please answer question iv) only

QUESTION 3 (20 MARKS] Table 2: XYZ Project Activity A B D E F G H I Pessimistic Most Likely Optimistic Predecessor 5 3 1 9 6 3 18 12 9 12 9 3 A 8 3 1 A 9 8 E 13 7 4 9 6 3 D 8 3 1 C G 16 BE (a) Table 2 indicates three different values for activity duration for XYZ's project. Find the answer for the following: 1.) Expected duration (te) for each of the activity. [9 Marks) (C01, POI, C4) ii.) Determine the critical path(s). [2 Marks)] (C01, PO1, C5) iii.) Calculate the standard deviation for the project. [1 Mark] [C01, POI, C4] iv.) Find the project's duration to be completed within 68.2% probability and 95.4% probability. [8 Marks) [C01, PO1, C1]