plesae $2)$ Calculate Early Start $($ES$),$ Early Finish $($EF$),$ Late Start $($LS$),$ Late Finish $($LF$)$ and Total Float $($TF$)$ for each task. activity table is attached as a picture, please give answer and calculations

$3)$ What is the total duration of the Stage $1$ of this project?

$4)$ Identify and show the Critical Path for the stage $1$

Question $1$B $(10$ marks$)$

One of your team members working on the Task $$Review and customise training material$$ has just had a baby and would need to go on maternity leave, a suitable maternity cover will not resume earlier than a month. The project has been struggling with limited resources, hence, the delivery of this Task would be delayed by $40$ working days.

Determine the impacts this would have on your schedule.