In the following table the activities with their precedence sequence and expected time $($days$)$ are listed for a project:

$\backslash$table$[[$Activity$,$Immediate Predecessor$($s$),$Time $($days$)],[$A$,-,6],[$B$,$A$,2],[$C$,$A$,4],[$D$,$B$,5],[$E$,$B$,5],[$F$,$C$,5],[$G$,$E$,$ F$,2],[$H$,$D$,3],[$I$,$G$,$ H$,6]]$

a$)$ The activities on the critical path are