4 Problem 15-7 (Algo) 0.25 points Consider the following table of precedence relationships for a portion of a house building project: eBook Hint Duration Task Estimates Immediate Predecessor(s) A Prepare Site 5 days None B Install Rough Plumbing 3 days Prepare Site C Pour Concrete Foundation 2 days Install Rough Plumbing D Concrete Curing Time 2 days Pour Concrete Foundation E Preassemble Wall Frames 6 days None F Erect Wall Frames 5 days Preassemble WF, Cure Concrete G Install Roof 3 days Erect Wall Frames H Install Wiring 10 days Install Roof I Install Exterior Siding 2 days Install Roof J Install Insulation 2 days Install Exterior Siding K Hang Drywall Install Insulation, Install 2 L Windows 1 day Hang Dry Wall M Paint Interior 5 days Install Windows N Paint Exterior 3 days Install Exterior Siding 0 Level Yard 3 days Cure Concrete P Landscape Yard 4 days Level Yard Print days Wiring Reference picture Click here for the Excel Data File a-1. Calculate earliest start and finish for each task. (Leave no cells blank - be certain to enter "0" wherever required.) Earliest Start Earliest Completion Immediate Task Predecessors A None B A D E None F D, E G H G 1 G J K HJ L K L NI D MOZET 0.25 points a-2. Calculate slack for every project activity. (Leave no cells blank - be certain to enter "O" wherever required.) Latest Start Slack eBook Hint Print Immediate Task Latest Successors Completion P None O P N None M M None L IM K K L J K J, N H K G HI E F IG G E F D F, O D B C A B Reference a-3. Identify the critical path. A-B-C-D-O-P A-B-C-D-F-G-I-N E-F-G-H-K-L-M E-F-G-I-J-K-L-M A-B-C-D-F-G-H-K-L-M c-1. What will happen to the project if the materials needed for the frame preassembly are not available until the second day of the project? Would delay the start of A Would delay the start of F The project will not be affected c-2. What if the materials were delayed until the tenth day? Would delay the start of A The project will not be affected Would delay the start of F F