ACTIVITY PREDECESSOR DURATION $($DAYS$)$

A

$-$

$15$

B

$-$

$25$

C

A;B

$10$

D

B

$13$

E

C;D

$8$

F

A

$9$

G

E;F

$12$

$4\mathrm{.}1$ 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.