Q$.10.$ For the following task table, draw the network diagram, calculate total duration of the project and find the critical path.

$(7)$

$\backslash$table$[[$Task$,$Successor,Duration $($days$)],[$A$,$C$,5],[$B$,$D$,3],[$C$,$E$,$ F$,4],[$D$,$F$,$ G$,6],[$E$,$H$,7],[$F$,$H$,$ I,$8],[$G$,$I,$7],[$H$,---,6],[$I$,--,6]]$