URGENT HELP REQUIRED FOR THIS PRACTICE QUESTION. Please assist, thanks in advance.

QUESTION:

PLEASE SHOW ALL WORKING . Thanks.

Immediate Time Activity Description Predecessor(s) Optimistica) (Weeks) Pessimistic (6) (Weeks) 6 A Most Likely (m) (Weeks) 4 4 2 --- B c 2 7 D E 1 2 1 4 F Expected Time = (a+ 4*m +b)/6 Variance= (b-a62 0.444444444 4 2 0 6.5 2.25 41 0.444444444 2 0.111111111 6 5.444444444 7 1.777777778 9 0.111111111 5 0.111111111 2 A B D E D G D F,H I 2 10 6 3 17 11 10 G 3 4 7 3 8 9 H I J K 4 5 6 1 (Expected time and Variance is already worked out for you): a) Using a network, what is the earliest expected time of completion of the whole project and identify the Critical Path or Paths in this project. (Draw the network - YOUR DIAGRAM MUST CLEARL SHOW THE VALUES LIKE THIS: Legend ES EF ET-7 d=27778 21 28 ET-8 O=0.1111 LS LF 38 26 28 33 0 21 ET = 21 26 28 D 26 28 ET-2 20.1111 36 38 ET2 50 21 26 ET=5 31 36 ET = 5 1.7778 b) 1) Using the information from the Table, what is the probability that the project can be completed in 28 days? ii) Using the information from the Table, if the project manager wants at least a 98% probability that the project will be completed on or before the due date, what is the shortest project due date that will satisfy the project manager