$$

consider the following activities $($time in weeks$),$

Draw activity in arrow diagram $(5$ marks$)$

what is the critical bath $(2$ marks$)?$

what is the probability of completing the critical path in $30$ weeks$(3$ marks$)?$

$\backslash$table$[[$activity$,$A$,$B$,$C$,$D$,$E$,$F$,$G$,$H$,$I,J$,$K$,$L$,$M$,$N$],[$predecessor$,-,-,-,$B$,$A$,$A$,$B$,$C$,$D$,$C$,$D$,$E$,$F$,$G$,$H$,$F$,$G$,$H$,$I,J$,$K$],[$duration$,3,4,6,3,9,1,4,5,4,3,6,3,6,9]]$