Can I have some explanation too please??

Consider the following network with the following activities and activity times (in weeks): The latest start time for node E is: 5 weeks 14 weeks 9 weeks 20 weeks Consider the following network with the following activities and activity times (in weeks): How many weeks does it take on average to complete the project? 16 weeks 25 weeks 20 weeks 32 weeks Consider the following network with the following activities and activity times (in weeks): The critical path of the project is: A>B>D>F>GA>B>C>F>CA>B>D>E>CA>B>C>E>G