The East Greensboro intramural basketball league manager, Donnie Jarrod, is planning the basketball program for the upcoming season. The first team practice is scheduled for September 1st. The following is the list of activities that must be completed before the season begins, their immediate predecessors, and the activity time estimates (in weeks). Activity Description Immediate Predecessor Time (weeks) Optimistic Most Probable Pessimistic A Meet with league coordinators B Hirecoaches C Reserve gym D Announce program E Meet with coaches F Order team uniforms G Register players H Collect team dues I Plan first practice None A A B, C B, C A D G E, H, F 1 2 3 3 3.5 7 1.5 2 2.5 1 2 3 2 3 4 1.5 2 2.5 2 2 2 3 4 5 0.5 1 1.5 Donnie needs help assessing whether this basketball season planning project will be completed before the first practice. You have been hired to analyze the project so he can determine if any additional actions need to take place in order to start the upcoming season on time. Answer the following questions to help him plan for the season. a. Calculate the expected durations and variances for each