i have few following doubts

1.) What is the float of activity 3

1.1) What is the float of activity 2

2.) The resource working on activity 3 is replaced with another resource who is less experienced. The activity will now take 10 weeks. How will this effect the project

3.) Using the original information, after some arguing between stakeholders, a new activity 6 is added to the project. It will take 11 weeks to finishing and must be finished before activity 5 and after activity 3. Management is concerned that adding the activity will add 11 weeks to the project. Another stakeholder argues the time will be less than 11 weeks. Who is correct in this?(The Project Manager, They are both wrong,Management, orThe stakeholder)

4.) Based on the information in number 5 above, how much longer will the

You are the Project Manager for a new project, and you have come up with the following duration and dependency table after consulting with your subject matter experts: Activity Predecessor Duration (weekf ' Activity 2 Activity 1 Activity 3 Activity 1 - Activity 4 Activity 2