Q4. LOGIC: On the start of the project 2 activities A&B start in parallel, on the finish of activity B activity D can start ,& on the finish of both the activities A&B activity C can start. When activity C finishes activity E can start & when both the activities i:e C&D finish activity F can start. On the finish of activity F, activities G, H & I start in parallel. When activity G finishes activity J starts . Activities J, H &I give output to activity K. Activity K & E give output to activity L which is the last activity of the project, Task A Optimistic 5 Pessimistic Most Likely 8 B 18 22 20 D 16 20 18 26 40 33 E 15 25 20 F 6 12 9 G 7 12 10 H 3 5 4 I 10 18 15 J 2 6 4. K 20 25 22 10 L 10 15 12 From the given logic and the data do the following:- (i) For each task determine the expected task time and their variance. (ii) Draw the network diagram in AIB format. Determine ES and EF of each activity. (iv) Find the critical path of the project. (20)