See the project task data in the table below. TAsk A, predeessor none, duration weeks 0; task b, predecessor A, duration weeks 10; task c, predecessor a, duration weeks 20; task d, predecessor b,c, duration weeks 30 ; task e, predecessor b,c, duration weeks 20; task f, predecessor e, duration weeks 40; task g, predecessor d,f, duration weeks 20; task h, predecessor g, duration weeks 0; ; Determine the length (in weeks) of the four pathways from the start to the end of the project. What is the critical path, and thus what is the estimated duration of the project? Determine the task slack for each of the tasks of the project