$\backslash$table$[[$Activity$,$Time $($weeks$),$Immediate Predecessor$($s$),$Activity,Time $($we$],[$A$,6,-,$E$,4],[$B$,6,-,$F$,7],[$C$,2,$A$,$G$,10],[$D$,1,$A$,$H$,8],[,,,,],[,,$Activity,ES$,$EF$],[,$A$,0,6,],[,$B$,0,6,],[,$C$,6,8,],[,$D$,6,7,],[,$E$,6,10,],[,$F$,6,13,],[,$G$,10,20,],[,$H$,13,21,],[,,,,]]$

Dave's latest start $($LS$)$ and latest finish $($LF$)$ are:

$\backslash$table$[[$Activity$,$LS$,$LF$],[$H$,13,],[$G$,11,],[$F$,6,],[$E$,7,],[$D$,12,],[$C$,9,],[$B$,0,],[$A$,3,]]$

The slack times are:

$\begin{array}{cc}\text{A}\text{c}\text{t}\text{i}\text{v}\text{i}\text{t}\text{y}& \text{S}\text{l}\text{a}\text{c}\text{k}\\ A& \\ B& \\ C& \\ D& \\ E& \\ F& \\ G& \\ H& \end{array}$

The activities on the critical path are

The total project completion time for Dave $=$ weeks $.$