Stadium Construction Project Problem: What is the latest finish for Activity D$?$

$\backslash$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$,4]]$

$2$

$8$

$7$

$6$