Doug Casey is in charge of planning andcoordinating next spring's sales management training program for his company. Doug listed the following activity information for this project:

Time (weeks) Immediate Activity Description Predecessor Optimistic Most Probably Pessimistic A Plan Topic - 1.5 2.0 2.5 B Obtain Speakers A 2.0 2.5 6.0 C List meeting locations - 1.0 2.0 3.0 D Select location C 1.5 2.0 2.5 E Finalize speaker travel plans B,D 0.5 1.0 1.5 F Make final check with speakers E 1.0 2.0 3.0 G Prepare and mail brochure B,D 3.0 3.5 7.0 H Take reservations G 3.0 4.0 5.0 I Handle last-minute details F,H 1.5 2.0 2.5 a. Draw a project network b. Prepare an activity schedule c. What are the critical activities and what is the expected project completion time?