critical path of the project?

$\backslash$table$[[$ACTIVITY$,$IMMEDIATE PREDECESSOR,DURATION $($days$)],[$A$,-,1],[$B$,$A$,4],[$C$,$A$,3],[$D$,$A$,7],[$E$,$B$,6],[$F$,$C$,$D$,2],[$G$,$E$,$F$,7],[$H$,$D$,9],[$I$,$G$,$H$,4]]$

ACEGI

ACFGI

ADHI

ADFGI

ABEGI