Prepare a network diagram for constructing a $5$ floor apartment, construct the network diagram $(1$ Mark$)$ and estimates in days as given below. Determine the total duration $(0\mathrm{.}5$ Mark$)$ and critical path $(0\mathrm{.}5$ Mark$).$

$\backslash$table$[[$Activity$,$Predecessors,Activity time $($weeks$)],[$A$,-,2],[$B$,--,3],[$C$,$A$,15],[$D$,$A$,6],[$E$,$A$,20],[$F$,$E$,35],[$G$,$D$,$ F$,55],[$H$,$B$,$C$,19],[$I$,$G$,$H$,6]]$

Note: use upto $3$ decimal in your answer and also kindly. upload your worked out sheet answer in link provided below.

Find the critical path value for the total project duration?

List the critical path activities in order.