The CEO of Carol O'Lights Manufacturing, produces custom-built relay devices for auto makers. The most recent project undertaken by Ms. O'Lights requires 11 different activities. The activities necessary to build an experimental relay model and related data are given in the following table. What is the slack on Activity A? ACTIVITY A B DEF G H I J K DESCRIPTION Order new Machinery Plan new physical layout Determine safety changes in existing machinery Receive equipment Hire new employees Make plant alterations Make changes in existing machinery Train new employees Install new machinery Relocate old machinery Conduct employee safety orientation PREDECESSOR C B, D A, E E F, G F, G D H, I, J TIME (WEEKS) 6 4 2 1 4 10 2 6 11 16 8