$4\mathrm{.}1$ Identify the paths for this network and state the critical path. $(5)$

$4\mathrm{.}2$ Calculate the Early Start $($ES$)$; Early Finish $($EF$)$; Late Start $($LS$)$ ; Late Finish $($LF$)$ and slack for each activity. $(15)$

Please use the following format for your answer:

ACTIVITY DURATION ES EF LS LF SLACK

$4\mathrm{.}3$ Explain the significance of identifying the critical path in a project and comment on Activity F on this project