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Explain Consider the following information about a small project: Task A B ? D E F Duration Estimates 4 days 6 days 1 day 5 days 3 days 9 days Immediate Predecessors None A B A B & D E & C pictureClick here for the Excel Data File b-1. Identify the critical path. O A-D-E-F A-B-E-F O A-B-C-F b-2. Identify the earliest start and finish, and slack for each task. (Leave no cells blank – be certain to enter “0” wherever required.) Task Immediate Predecessors None Earliest Start (ES) Earliest Completion (EC) A B A ? B D ? E E F BD CE Task Latest Completion Slack Latest Start (LS) Immediate Successors None F E F D E C ?? B C, E BD A c. Which of these activities should the project manager track most closely? O A-B-E-F O A-D-E-F O A-B-C-F