c$.$ What is the slack for each activity?

$\backslash$table$[[,\backslash$table$[[$Activity$],[$Time$],[($days$)]],\backslash$table$[[$Slack$],[($days$)]]],[$Activity$,5,0],[$A$,4,0],[$B$,3,0],[$C$,9,0],[$D$,3,6],[$E$,3,7],[$F$,2,3],[$G$,4,0],[$H$,4,0]]$