I really need help on this ASAP due tonight at 12 please!

Doug Casey is in charge of planning and coordinating next spring's sales management training program for his company. Doug listed the following activity information for this project: Immediate Time (weeks) Activity Description Predecessor(s) Optimistic Most Probable Pesssimistic A Plan topic 1.5 2 5.5 B Obtain speakers A 2 2.5 3 List meeting locations 2 2 2 D Select location C 0.5 2 3.5 E Finalize speaker travel plans B, D 1 1 1 F Make final check with speakers E 2 2 2 G Prepare and mail brochure B, D 2 2.5 6 H Take reservations G 4 5 6 I Handle last-minute details F, H 1.5 3 4.5 a. Which project network is correct? (i) (ii) A B E F B E F Start iH Finish Start Finish D H D H (iii) B E F (iv) A B E F Start I Finish Start 1 Finish D G H D G H b. Prepare an activity schedule. If required, round your answers to two decimal places. If your answer is zero, enter "0". Activity Expected Time Variance A B C D E F G lll 1101 H I Earliest Latest Earliest Latest Critical Activity Start Start Finish Finish Slack Activity A B D E F G LIII Ill bull ull H I What are the critical activities and what is the expected project completion time? If required, round your answer to one decimal place. Expected project completion time = weeks. If Doug wants a 0.99 probability of completing the project on time, how far ahead of the scheduled meeting date should he begin working on the project? Base your calculation solely on the critical path. Note: Use Appendix B to identify the standard score. If required, round your answer to one decimal place. T = weeks